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1·It declines with the increase of times of direct assembling bolt knocked-down. But it can still reach that of nylon inbuilt nut after knocked-down 8 to 9 times.

直接拧入式螺杆的极限抗拔力随着拆装次数的增多而下降，但是，当拆装次数为8-9时，极限抗拔力仍然可达到尼龙预埋螺母的水平。

2·This paper presents the customized equipment suitable to screw adjusting bolt module in cover sheet assembly (preassembly) for automobile assembling process.

介绍了一种自行研制的装配专机，适用于汽车“盖板总成(预装配)”中将“调整螺钉总成”拧进“盖板总成”的装配工序。

3·Assembling can be made without using bolt.

不用任何螺栓，安装拆卸方便。