pattern screw的意思|示意

Its explicitly explained how the cleavage step pattern is formed by the cleavage crack intersecting with screw dislocation.

本文对解理台阶的形成模型——解理裂纹与螺位错交割模型进行了诠释。

Shipbuilding . sea water valves . screw - down stop - and - check valves with opening mechanism . pattern iv . operating mechanism parts list.

造船工业。海水专用阀门。带打开机构的螺杆向下止动和止回阀。式样。操作机构零件细目表。