A.輪齒折斷B.齒面疲勞點(diǎn)蝕C.齒面磨損D.齒面膠合
A.2°~8° B.8°~20° C.20°~30° D.30°~45°
A.模數(shù) B.模數(shù)和齒數(shù) C.模數(shù)和壓力角 D.模數(shù)、齒數(shù)和壓力角