主要生产和销售六角头螺栓、六角法兰面螺栓、双头螺栓、马车螺栓、组合螺钉、钻尾螺丝、全牙丝杆。
Produce and sell six head bolt, bolt, pairs of head bolt, carriage bolt the six flange, make screw up, get into tail screw, the whole tooth silk pole mainly.
用控制器螺钉固定好高度，按压控制螺钉，重锤即自由落在冲杆上，冲杆将冲击力传到样板上。
Fix the controller at the required height in the graduated guide-tube; and press the control screw, the cylinder will fall on the indenter and then transfer the impact on the film panel.
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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