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鼓形滚柱 | |
wind. | barrel roller |
轴承 | |
bridg.constr. | axle bearing |
hydroel.st. | bearing; shaft bearing; axis bearing |
met. | metal |
steel. | bear; bearing plate |
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barrel roller |
鼓形滚柱 : 4 phrases in 3 subjects |
Oil / petroleum | 1 |
Technology | 1 |
Wind Energy | 2 |