| 单词 | balance-bob |
| 释义 | > as lemmasbalance-bob balance-bob n. (see quot.). ΘΚΠ society > occupation and work > equipment > pump > [noun] > other parts of pumps pump box1422 pump-staff1422 pump-tree1617 branch1659 pump rod1731 pear-gauge1753 barometer-gauge1783 bucket-door1797 head1824 balance-bob1838 suction primer1875 cup-leather1889 airline1893 1838 Civil Engineer & Architect's Jrnl. 1 409/1 The heavy pump rods, balance bobs &c., attached to a mining engine. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 104 Balance-bob, a heavy lever ballasted at one end, and attached at the other to the pump-rod, the weight of which it thus helps to carry. < as lemmas |
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