runner pitch circle转轮: reel; runner节圆: pitch circle; nodal circle蜗轮节圆: pitch circle of wormwheel齿轮节圆直径: pitch diameter轮节: ring 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:转轮节圆，即可在微信中查询翻译
