蜗杆与扇形轮,蜗杆与扇形齿轮副的英文

worm-and-sector

• 蜗杆:    worm; endless scre ...
• 与:    take part in; part ...
• 扇形:    fan-shaped
• 扇形齿轮:    gear sector; gear ...
• 副:    assistant