单词：pawls
(pawl 的复数) n. 棘爪, 制转杆, 卡爪
vt. 用掣爪停转
vt. 用掣爪停转
plural of pawl
n. a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward
n. a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward