The device as set forth in claim 1, wherein the at least one hinge fitting includes a plurality of shear pin slots configured to receive corresponding shear pins.
该装置所规定的索赔1 ，其中至少有一个铰链配件包括一个多元化的剪切针插槽配置得到相应的剪切销。
2
The rig tongs hingepin, latch lock and springs must be inspected at regular intervals and changed out if excessive wear is encountered.
必须定期检查大钳的折页销子，扣合头和弹簧，如果出现磨损超标，就更换。
3
Crimp hinge ends after pin installation to retain pin.