常見例句雙語例句There is only approximate way to work out the normal chordal tooth thickness of worm and wormwheel at present.目前所見到的圓柱蝸桿蝸輪分度圓弦齒厚計(jì)算公式均爲(wèi)近似公式。There is no common normal in the conical involute gear and the fixed chordal tooth thickness can not be measured accurately because of the coexistence of helix angle and taper.漸開線錐形齒輪由於同時(shí)存在錐度和螺鏇角，使得其固定弦齒厚無法精確測(cè)量，也沒有公法線。 返回 chordal tooth thickness