机械工程专业英语词汇翻译
制颈工具，制颈刀具 necking tool针 needle滚针轴承 needle bearing (needle roller bearing)针状结晶 needle crystal针电极 needle electrode针锉 needle file针隙 needle gap针击枪 needle gun针阀升程 needle lift针孔润滑器 needle lubricator针尖喷嘴 needle nozzle针尖 needle point指针 needle pointer针心调整阀 needle regulator针杆 needle rod滚针 needle roller滚针轴承 needle roller bearing (needle bearing)针阀 needle valve负加速度 negative aceeleration负裕度 negative allowance负阻尼因数 negative damping factor负乏气余面 negative exhaust lap负水头 negative head负投射角 negative incidence负导程（阀） negative lead语际翻译 版权所有
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