pitch diameter节径: pitch diameter; nodal diamet ...中: hit; fit exactly径: footpath; path; track齿轮: cogwheel; gear wheel wheel-l ...节: joint; knob; node下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:节径中径齿轮节径，即可在微信中查询翻译
