| 单词 | ballast pocket |
| 释义 | ballast pocketnoun Railroads.a depression that is formed beneath the ballast layer by penetration of ballast particles into the subgrade and that tends to collect moisture. Words nearby ballast pocketBallard, Ballardian, ballas, ballast, ballast line, ballast pocket, ballata, ball bearing, ball boy, ballbreaker, ball-buster Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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