以保证结构件有足够连接强度为重点要求的铆接,称为()。
A. 强固铆接
B. 密固铆接
C. 紧密铆接
D. 不确定
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对别人进行批评时,要尽量使用转化、启发、暗示等迂回的言语方式。
A. 正确
B. 错误
两块钢板或两种型钢构件需要连接成丁字形或直角形,一般都用()连接。
A. 槽钢
B. 工字钢
C. 角钢
D. 不确定
If the high-pressure switch on the compressor opens and stops the compressor a possible cause could be:()
A. too much cooling water going through the condenser
B. not enough refrigerant in the system
C. a leak in the evaporator coils
D. no enough cooling water going through the condenser