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top hole ['tɔp'həʊl]
compr. 顶口
dril. 上部井眼
oil 顶部井眼
tech. 上部孔段; 顶孔
top-hole ['tɔp'həul]
gen. 第一流的; 最高的; 地位最高 〔好〕的; 出钢口
interntl.trade. 头等的; 高级的
top hole
: 16 phrases in 6 subjects
Drilling2
Engineering geology1
Mining3
Oil / petroleum3
Rail transport1
Technology6

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