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hollow column | |||
open hole column; open tubular column | |||
open column | |||
cased column |
空心柱 : 41 phrases in 9 subjects |
Architecture | 1 |
Automobiles | 1 |
Chemistry | 5 |
Electronics | 1 |
Engineering geology | 3 |
Mining | 1 |
Oil / petroleum | 2 |
Space | 3 |
Technology | 24 |