A. N. s. I. standard b2.4-this standard controls NIBCO hose couplingscrew threads.
标准B2.4 -这个标准控制美国尼必可软管连接螺丝螺纹。
2
In the second chapter, the interaction among a screw dislocation, circular interfacial crack and inclusion is solved based on the electromechanical coupling relation of piezoelectric material.
第二章基于压电材料的机电耦合关系求解螺型位错、圆形界面裂纹与夹杂之间相互作用的问题。
3
New technology and new construction, such as hydraulic coupling, dismountable scraper chain, pneumatic discharge gate valve and screw tensioning device with multi-spring buffer are used.