凿岩钎具 冲击凿岩锥形连接钻杆和可拆式钻头

[中文适用范围]： 规定了钻杆的基本尺寸和锥形连接的必要尺寸。 这些尺寸应分别符合图1和表1以及图2和表2中给出的尺寸。 [外文原描述]： Lays down the basic dimensions of drill rods and the necessary dimensions of the tapered connections. These dimensions shall comply with those given in figure 1 and table 1 and in figure 2 and table 2, respectively.