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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Magdaleen Suzanne Marais - SUNScholar

and [18] are, for instance, beautiful ,examples, of where the structure of the ,centralizer, of a certain ,element, in a ring can be used to determine some information about the ring’s structure. (The results in [18] were extended in [22].) Let us, for example, consider the …

Can I purchase a replacement base for my Anglepoise Desk Lamp?

You can indeed purchase a range of accessories for your ,Anglepoise lamp,, including bases for ,desk, lamps. If your base has unfortunately been damaged or you would like to switch from another accessory you are using (,desk, clamp, wall bracket, ,desk, insert), a selection is available for purchase here.. We currently have a selection of Type 75 bases available to purchase, however, if you need an ...

Anglepoise 1227 Desk Lamp: where to buy how to style and ...

The first ever Anglepoise ,lamp, was the 1227 ,Desk Lamp, design. The design was conceived and penned in 1932 by suspension engineer George Carwardine. The Anglepoise range has, in recent years, been significantly extended by designer Kenneth Grange, particularly with the hugely popular Type 75, and Anglepoise now boasts collaborative designs with Paul Smith and Margaret Howell too.

Anglepoise Desk & Table Lamps | John Lewis & Partners

Optimise your study area with a classic anglepoise ,desk lamp,. Anglepoise lamps are an iconic lighting solution which allows you to adapt the distance of brightness you need to complete your work. Our collection of anglepoise table lamps feature simple designs as well as creative and modern twists of the quintessential lighting piece.

On the structure of the centralizer of a braid

The mixed braid groups are the subgroups of Artin braid groups whose elements preserve a given partition of the base points. We prove that the ,centralizer, of any braid can be expressed in terms of semidirect and direct products of mixed braid groups. Then we construct a generating set of the ,centralizer, of any braid on n strands, which has at most k(k+1)2 elements if n=2k, and at most …

Anglepoise 1227 Desk Lamp: where to buy how to style and ...

The first ever ,Anglepoise lamp, was the 1227 ,Desk Lamp, design. The design was conceived and penned in 1932 by suspension engineer George Carwardine. The ,Anglepoise, range has, in recent years, been significantly extended by designer Kenneth Grange, particularly with the hugely popular Type 75, and ,Anglepoise, now boasts collaborative designs with Paul Smith and Margaret Howell too.

Anglepoise Desk Lamps for sale | eBay

From this, in 1933 the first 4 spring industrial ,lamp, was designed, followed by a three spring version for the domestic market in 1935. This was the ,Anglepoise desk lamp, that we all recognise today. History of ,Anglepoise desk lamps,. The first ,Anglepoise desk lamp, was called the Original 1227.

Anglepoise lamp - Wikipedia

In June 1949 he issued a memo to all staff in which he forbade BBC employees to illuminate any room with an ,Anglepoise lamp, unless the main ceiling or wall light was also illuminated: Standing held a firm belief that a man working at a ,desk, in a confined space with only the light from a low-wattage ,lamp, would nurture furtive ideas and produce degenerate programme material.

Anglepoise Lighting

Anglepoise, Lighting. Browse our latest collection of ,desk, lamps and table lamps, wall lights, pendant and ceiling lights, floor lamps and outdoor lamps below. ... Type 75 ,Desk Lamp, - Margaret Howell Edition Yellow Ochre. $255.00. Out of Stock. 90 Mini Mini ,Desk Lamp, Carbon Black & Black.$150.00. Type 75 Mini ,Desk Lamp, Jet Black. $215.00. What is the centralizer C in group theory? - Quora The ,centralizer,, denoted ${\displaystyle \mathrm {C}_{G}(z)}$, is the set consisting of elements which commute with a given ,element, $z$ of a ... How can I date my vintage or current Anglepoise lamp ... - The second fifth ,desk lamp, product designed by Sir Kenneth Grange for ,Anglepoise, - The design was designed as a smaller version of the Type 75 - It featured an inline switch - The updated version can be seen here, the Type 75 Mini . Original 1227 Mini (2015 - current) - A smaller version of the Original 1227 - Features an inline switch Amazon.com: anglepoise lamp LEPOWER Metal ,Desk Lamp,, Adjustable Goose Neck Architect Table ,Lamp, with On/Off Switch, Swing Arm ,Desk Lamp, with Clamp, Eye-Caring Reading ,Lamp, for Bedroom, Study Room &Office (Sandy Black) 4.5 out of 5 stars 2,086.$39.99 \$ 39. 99. ... ,anglepoise, type 75 ,desk lamp, luxo ,lamp

regular element of a Lie algebra - PlanetMath

An ,element, X ∈ 𝔤 of a ,Lie algebra, is called regular if the dimension of its ,centralizer, ζ 𝔤 ⁢ (X) = {Y ∈ 𝔤 ∣ [X, Y] = 0} is minimal among all centralizers of elements in 𝔤. Regular elements clearly exist and moreover they are Zariski dense in 𝔤 .

Classification of groups in which the centralizer of every ...

Well, in a finite group, if the ,centralizer, of each non-identity ,element, is cyclic, then each Sylow subgroup is cyclic ( for every prime) ... Rips found (torsion-free) ,examples, of finitely generated but infinitely presented (and hence not hyperbolic) subgroups of hyperbolic groups in the early '80s.

A graph associated to centralizer of elements of a group ...

For a given nonabelian finite group G and S ⊆ G ∖ Z (G), where Z (G) denotes the center of G, we introduce a new graph Γ (G, S) associated to the group G as follows: Take G ∖ (S ∪ Z (G)) as its vertex set and two distinct vertices x and y being adjacent if and only if there exists an ,element, s ∈ S such that [x, s] = 1 = [y, s].