在剖视图中，螺栓、螺母和垫圈等螺纹紧固件均按不剖绘制。
查看答案
在剖视图中相邻两零件的剖面线应不同。
A. 对
B. 错
为保证可靠的压紧，螺纹孔的深度比螺杆的旋入长度多0.5d。
A. 对
B. 错
founder
A. a refusal to accept, hire, or buy
B. related to government control of social and economic activity
C. a person who starts a company
born with a silver spoon in one’s mouth
A. to be born into a wealthy family
B. the changing of words into a different language
C. a person who promotes and represents an idea, product, or business
微信支付 
支付宝支付