单词	vitamin r
释义	vitamin r 鸡的生长因子
随便看	helical gear pump helical-gear pump helical gear reducer helical gears helical gear shaft helical gearshaper cutter helical gear shaper cutter helical gear-shaper cutter helical gear slotting helical gear teeth helical gear tooth Helical gear transmission helical gear type helical gear wheel meter helical gear with helix angle helical gear with jaw helical grid helical groove helical-groove helical groove broaching machine helical groove design Helical groove in bearing bore helical-groove profile milling cutter helical groovespiral flute, twisted flute helical guidance locus