| 单词 | twofold purchase |
| 释义 | twofold purchasenoun Machinery, Mechanics.a purchase using a double standing block and a double running block so as to give a mechanical advantage of four or five, neglecting friction, depending on whether the hauling is on the standing block or the running block. Words nearby twofold purchasetwo-faced, two-family house, twofer, two-fisted, twofold, twofold purchase, two-four, two-four time, two-glass test, two-handed, two-hander Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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