...制造膛线的方法主要有: 单点钩切法、 多点拉削法(broach rifling)、 模头挤压法(button rifling), 锤锻法(hammer forge)。
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Drop hammer: a machine consisting of an anvil or base aligned with a hammer that is raised and then dropped on molten metal used to forge or stamp the metal resting on the anvil.
落锤:由钻或底座及与之对齐的锤组成的机器,锤被举起后落在融化金属上用于锻造或冲压放在砧板上的金属。
Hammer was sleeping off a drunk when they reached the forge, just as Kem had prophesied, but Nail had no objection to the two dwarfs clambering through the wagons.
当他们来到锻造间时还摩尔就像海姆预测的那样正呼呼大睡以醒酒,但是内尔对两个侏儒吃力的爬上货车显然没有异议。
A heavy forge hammer having a pivoted lever by which it is tilted up and then allowed to drop.
锻造用的重锤,通过带枢轴的杠杆将它倾斜抬起,然后落下。
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