一个特大型吊孔，使存储容易。
井架用来吊升分节油管，把油管放入有钻头打出的孔中。
It is used to lift the sections of pipe, which are lowered into the hole made by the drill.
吊具上臂的连接孔穿有连接卸扣，连接卸扣连接主钢丝绳吊系；
The connecting hole on the upper arm of the hoist is penetrated by a connecting shackle connected with a main steel cable hanging rope.
后钢板弹簧吊零件的主要加工表面是平面及孔。
Spring plate after hanging parts of the main plane of the surface and pore.
吊具上臂的副吊系连接板的孔内连接副钢丝绳链条吊系和转向小绳。
The hole of the auxiliary hanging rope connecting plate of the upper arm of the hoist is connected with an auxiliary steel cable chain hanging rope and a small steering rope.
吊具上臂的副吊系连接板的孔内连接副钢丝绳链条吊系和转向小绳。
The hole of the auxiliary hanging rope connecting plate of the upper arm of the hoist is connected with an auxiliary steel cable chain hanging rope and a small steering rope.
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