正齿 meaning in Chinese

commutating tooth
spur teeth
spur type

Gear drawing standards - part 1 : for spur , helical , double helical and rack
齿轮制图标准.第1部分:正齿.螺旋齿.双螺旋齿和齿条
To all orthodontics patients , one free check up & teeth cleaning for your parents or friends ! new ortho - people will be given more benefit ! enjoy it in summer
致所有亚正齿科矫正病人：暑假期间您的父母或朋友可得到一次全免费的口腔检查和专业洁牙服务.矫正新体验者会有更多优惠！