【机械工程】狭缝快门(滚帘式快门)

diaphragm wall (slotted wall)

slotted hole screen (needle slot screen, bar screen)

slotted spring-finger plunger

slotted drum (split drum)

slotted oval countersunk head wood screw

double-slotted flap

slotted-ring network【计】

slotted head screw