hammer drill
柯林斯詞典
1. N a rock drill operated by compressed air in which the boring bit is not attached to the reciprocating piston 沖擊式鉆機(jī); 鉆片不在擺動(dòng)的活塞之上，通過壓縮空氣操作的巖石鉆機(jī)
返回 hammer drill
1. N a rock drill operated by compressed air in which the boring bit is not attached to the reciprocating piston 沖擊式鉆機(jī); 鉆片不在擺動(dòng)的活塞之上，通過壓縮空氣操作的巖石鉆機(jī)
<pre id="wwky9"><delect id="wwky9"></delect></pre>