| 单词 |
feed-control valve |
| 释义 |
feed-control valve feed-control valve[′fēd kən‚trōl ‚valv] (mechanical engineering) A small valve, usually a needle valve, on the outlet of the hydraulic-feed cylinder on the swivel head of a diamond drill, used to control minutely the speed of the hydraulic piston travel and hence the rate at which the bit is made to penetrate the rock. |
| 随便看 |
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