... . Total weight: 20t SC Type Construction Hoist 1.The product mainly includes:Guide frame, driving body, drive ... down eletric box, underframe guardrail, cable frum, cable guide frame, attachment device, cable jib, manual crane, ... actions of each safe spacing switch is flexible, each spacing bumping block has moved.3 ... out door, protective fence door etc. are flexible, check the action of each spacing switch ...