... 2. Features a mechanical interlock to ensure safety. Rain proof Hoist crane pendant pushbutton switch heavy duty1. Description:Rain proof crane ... , rainy and snowy, dusty and damp environment, such as electric hoist, open conveyor blt, building line etc. .2. Dimension:3. ... shop , realize the fully producing from mould making, spare parts till finished products. 3.Standard copper material and fully set ...