蜗杆在上方的蜗轮蜗杆传动的英文

over driven worm gear

• 蜗杆:    worm; endless scre ...
• 在:    exist; be living
• 上方:    superjacent; above
• 的:    4次方是 The fourth po ...
• 蜗轮:    worm gear; worm wh ...
• 传动:    transmission; driv ...