通过对一种带有内螺纹的酒瓶盖的结构分析，阐述了采用大导程螺杆和螺母机构实现螺纹型芯自动旋转脱模的设计过程及其工作过程。
Through analyzing of a bottle cover structure with inner thread, a type of screw and nut with coarse pitch was applied to realize thread core demoulding automatically.
柴油机横臂导杆折断会带来严重后果，经分析认为其折断原因有：同名气门杆顶部不齐；调整螺母松动，调整螺钉窜动；气门导管与气门杆间隙量大。
The reasons are: different top heights of valve rods having the same names; loose adjustment nuts or adjustment screws moving; and big clearances between valve guides and valve rods.
柴油机横臂导杆折断会带来严重后果，经分析认为其折断原因有：同名气门杆顶部不齐；调整螺母松动，调整螺钉窜动；气门导管与气门杆间隙量大。
The reasons are: different top heights of valve rods having the same names; loose adjustment nuts or adjustment screws moving; and big clearances between valve guides and valve rods.
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