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岩塞 yánsāi
eng.geol. plug
expl. rockplug
oil rock plug
岩塞
: 59 phrases in 10 subjects
Drilling2
Engineering geology3
Explosives and Explosive Ordnance Disposal11
Geology2
Hydroelectric power stations1
Mountaineering3
Oil / petroleum5
Outdoor activities and extreme sports1
Soil science1
Technology30

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