第二类酶的另一种切割方式是在同一位置上切割双链，产生平末端，简称平端。这种平端可以通过DNA连接酶连接起来。
... benchtop microcentrifuge台衰落量离心数心情 blunt terminus平端 basal transcription factor根底转录因数 ...
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建立了平端光纤与锥端微透镜光纤对耦合的理论模型，得到耦合系数的计算公式。
The coupling between butt fiber and cone lensed fiber is described in this paper. A theoretical model is presented and the formula of coupling efficiency is given.
本文主要介绍如何在原有的承插管道芯模上通过技术改造生产平端管道，以及工艺改造带来的经济效益。
The article introduces how to produce flat end pipes on original plug pipe mandrel through technical modification and economic benefits.
在逆止器的轴端孔内通过胀套和双平键与从 动轴连接；
The inner part of a shaft end hole of the backstop is connected with a driven shaft through an expansion bush and a double flat key;
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