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cleaning hole
compr. 清砂孔铸件的
met. 清理孔
railw. 清扫口
tech. 出砂孔; 清扫孔; 清除孔
clean hole
dril. 洗井
tech. 清洁钻孔
cleaning hole: 19 phrases in 7 subjects
Chemistry1
Drilling3
Earth sciences1
Engineering geology2
Explosives and Explosive Ordnance Disposal1
Oil / petroleum4
Technology7