本文研究了含幺可换环上一般线性李代数的子代数结构。
In this paper, we study the subalgebra structure of the general linear Lie algebras over commutative rings.
本文主要对几乎可换环上酉群的基本子群的正规性进行了研究。
This thesis mainly works on the normality of elementary subgroup of Unitary group over almost commutative rings.
我们的结果是定理1 设R 是零因子可换环，那末R是非奇异的当且仅当R 是半素的。
Our result is Theorem 1 Let R be a ring such that zero divisors commute. Then R is nonsingular if and only if R is semiprime.
螺纹锁紧环换热器具有密封性能可靠，拆装方便，换热面积的利用率高，结构紧凑，占地面积小等特点。
The breech lock closure type heat exchanger is characterized by reliable sealing performance, easy dismantling and assembling, high utilization ratio of heat exchange area and small grounding.
本文的目的是证明关于结合环可换性的三个定理。
The object of this paper is to prove three theorems of associated ring's commutativity.
在国内外首次研究了结构尺寸对极限偏心环缝中液氮的沸腾换热特性的影响。
In this paper, the effect of configuration size on the liquid nitrogen thermosyphon boiling heat transfer behavior in extreme eccentric annulus is studied for the first time.
单管的实验研究证实，选用合理的绊条扰流结构，可使环翅管的绕流阻力降低40％，换热增强10％。
An experimental investigation showed that compared with a general external fins pipe, the new way can reduce the drag more than 40% and enhance the heat transfer about 10% meanwhile.
在常压下对竖直光管和环隙流道内沸腾换热启动阶段的壁温变化规律进行了实验研究。
An experimental investigation on transient of wall temperature in start-up process of pool boiling heat transfer, on vertical plain tube and narrow annuli under atmospheric pressure, was carried out.
为了最后有更多的时间相处，她求了好多同事和她换早班、调休假，每天晚上打车到西三环去找他…… 他有很多重要的考试，又生病。
In order to have more time to been together, she asked her colleagues to changed her shift, to leave in lieu, every night she took taxi to the third ring road west section to find him.
叉式多针系列缝合器是一种多针头、多针型、可换针、并采用环式挂线法穿线的缝合器械。
This series of forked suturing device is designed for surgical use matching many needles and. multiple shaped needles. It is capable of changing needles with method of round threaded.
山东环盾机械有限公司成立于1996年，是一家集锅炉、水暖热风炉、换热设备、通风降温设备制造于一体的集团公司。
Shandong Global Shield Machinery Co. , Ltd. was founded in 1996, professional manufacture of Boiler, Hot blast stove, Heating-exchange equipment, Ventilation and cooling equipment.
活塞环为便于拆换的开口环或分段环。
The piston ring is an opening loop or a grading ring which is convenient to disassemble and replace.
操作使用1、使用前调整电刷与集流环(换方器)，使之接触良好。
Operation (1) Adjust the brush and the collector ring (commutator) before the operation and keep good contact.
操作使用1、使用前调整电刷与集流环(换方器)，使之接触良好。
Operation (1) Adjust the brush and the collector ring (commutator) before the operation and keep good contact.
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