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阀导承
| 护圈
| 阀导承 | |
| mech.eng. | valve guide |
| met. | valve guide |
| 护圈 | |
| eng.geol. | collar |
| met. | guard ring; retainer |
| shoot. | sight protector |
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| valve guide | |||
| strap valve guide | |||
| |||
| valve guide | |||
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阀导承 : 8 phrases in 3 subjects |
| Compressors | 2 |
| Metallurgy | 2 |
| Technology | 4 |
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