Construction elevator pager construction site hanging cage lift man cargo elevator wireless waterproof intelligent floor call bell

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Color classification:: Double large host + 10 waterproof extension double large host + 15 waterproof extension double large host + 20 waterproof extension double large host + 25 waterproof extension double large host + 30 waterproof extension double small host + 35 waterproof extension double small host + 10 waterproof extension double small host + 15 waterproof extension double small host + 20 waterproof extension double small host + 25 waterproof extension double small host + 30 waterproof extension double small host + 30 waterproof extension double small host + 35 waterproof extension large host small host