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By certification 
(1) Screw type chain cable compressor
(2) Roller lever chain stopper
(3) Devil's claw
(4) Simple machine for releasing anchor
(5) Screw type cable releaser
(6) Dog type cable clench
(2) Roller lever chain stopper
(3) Devil's claw
(4) Simple machine for releasing anchor
(5) Screw type cable releaser
(6) Dog type cable clench
