1)drill goods,钻井用管材2)drilling pipe,钻井管材3)drill tubing,钻井用油管4)fibrous materials,钻井用纤维材料5)Composite drilling pipes,复合材料钻井管6)jacket cap for drilling,钻井用导管架帽
用法例句
The modification and application of jacket cap for drilling:case in reducing development cost of cluster of LD oil fields;
