In manual element sealing strips are operated using a crank.
人工操作曲柄控制隔音条的伸缩.
A standard element of technology that can be traced to 1878 and the invention of the manual telephone exchange, the jack is apparently going the way of the floppy disk and the folding map.
这一标准技术元素可追溯至1878年,来自人工电话交换系统。它似乎正在步入软盘和折叠地图的后尘。
Based on the manual adjusting lever of brake clearance, the finite element optimization model of control components of adjusting mechanism is created.
在制动器制动间隙手动调整臂的基础上,应用有限元优化设计技术,建立了调整机构控制零件的有限元优化设计模型。
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