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drive head
coal.	孔口套管帽
dril.	击入套管帽
eng.geol.	打头; 打垫; 承锤头; 桩垫; 錘頭動力觸探
met.	驱动装置
tech.	桩帽; 传动机构; 承锤头 (桩的、触探); 套管帽; 钻杆打头

drive head: 32 phrases in 6 subjects

Badminton	1
Drilling	5
Electric machinery	1
General	1
Oil / petroleum	5
Technology	19