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岩石钻孔 干式钻杆和钻头 连接尺寸
Rock drilling-Rotary drill-rods and rotary drill-bits for dry drilling-Connecting dimensions
价格：￥0.00
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KY-250,KY-310牙轮钻机
价格：￥0.00
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煤矿用反井钻机通用技术条件
General specification for raise-boring machine in coal mine
价格：￥12.00
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伞形钻架
Umbrella drilling derrick
价格：￥0.00
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卡瓦式止浆塞
Slip-fixed packers for grouting
价格：￥0.00
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