【机械工程】弹簧卡子（直接固定夹子）

spring-operated, throwing arm clay pigeon trap

spring for actuation of a spring (key) with rings

spring-loaded accumulator

spring ring (spring washer) screw locking device (screw locking)

torsion-spring actuated door hinge

spring mounting spring mounting of planing surfaces

black japanned screen door spring hinge

springstick measurement of pain