Due to the different deoxidation methods, the ordinary low alloy steel has excellent performance, which requires that the material must be able to withstand the reciprocating force.
在冶炼时由于脱氧方法的不同,由于普通低台金钢具有优良的性能,这就要求材料必须经受得住往复力的作用。
In ordinary stripping operations, the pipe falls into the wellbore under its own weight, and no additional downward force or pushing is required.
在平常的不压井起下钻作业中,管柱下入井眼是依靠其自身重量,不需要附加的向下载荷或者推力。
The motive force of esthetic judgment is to expect aesthetically. The aesthetic methods are the combinations of ordinary image thinking and artistic thinking.
审美能力的动力因素是审美期待,审美所使用的方法因素是普通的形象思维和艺术思维的结合。
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