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through cave | |||
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penetration |
穿洞 : 21 phrases in 11 subjects |
Automobiles | 2 |
Ceramics | 1 |
General | 2 |
Hydroelectric power stations | 1 |
Mountaineering | 1 |
Oil / petroleum | 1 |
Plastic surgery | 1 |
Surgery | 3 |
Technology | 5 |
Textile industry | 2 |
Wood processing | 2 |