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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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hydraulic power tong

Centers of Centralizers of Unipotent Elements in ...

centralizer, H ˘CG(CG(u))– ˘ Z(CG(u))–. In good characteristic the double ,centralizer, was described in [Sei04] and [LT11]. It can be shown that CG(u) ˘CG(CG(CG(u))–). The ﬁrst part of the thesis contains a characteristic free description of the double ,centralizer

Centralizer - Art of Problem Solving

A ,centralizer, is part of an algebraic ,structure,.. Specifically, let be a magma, and let be a subset of .The ,centralizer, of is the set of elements of which commute with every ,element, of .. If are subsets of a magma , then .The bicentralizer of is the ,centralizer, of .Evidently, .The ,centralizer, of the bicentralizer, , is equal to , for , but , so . If the magma is associative, then the ...

(PDF) The centralizer of an element in an endomorphism ...

the centralizer of an element in an endomorphism ring 11 4.6.theorem. Let ϕ : M −→ M be a nilpotent R-endomorphism of the finitely generated semisimple left R-module R M . Then the centralizer Cϕ (as a Z(R)- submodule of HomR (M, M )) is the homomorphic image of some Z(R)-submodule of a certain md-generated R-submodule of Mm×m (R[t]), where d = dimR (M ) and m = dimR (ker(ϕ)).

The centralizer of an element in an endomorphism ring ...

THE CENTRALIZER OF AN ELEMENT IN AN ENDOMORPHISM RING 3 the diagonal. The number of the diagonal blocks in A i is m i = dim(ker(A− λ iI)) and the size of A i is d i × d i, where d i is the multiplicity of the root λ i in the characteristic polynomial of A. For a matrix X∈ M d i×d i (K) we have X∈ C A i if and only if X= [X k,l] is an m i × m i matrix of blocks, where X

COMPONENT GROUPS OF UNIPOTENT CENTRALIZERS IN GOOD ...

Let u2Gbe a unipotent ,element,, and let A(u) = C G(u)=Co G (u) be the group of components (“component group”) of the ,centralizer, of u. We are concerned with the ,structure, of the group A(u) (more precisely: with its conjugacy classes). Consider the set of all triples (1) (L;tZo;u) where Lis a pseudo-Levi subgroup with center Z= Z(L), the ...

(PDF) Structure of centralizer algebras

S n(C,R):=S(C,Mn(R)) is called a ,centralizer, matrix ring over Rof degree n. For a matrix c∈Mn(R), the ring Sn(c,R):=S(c,Mn(R)) is called a principal ,centralizer, matrix ring over Rof degree n ...

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