Ventilation type mooring bitts 通风式带缆桩

tunnel injector type ventilation 隧道射流式通风 ; 隧道射流通风

Y-type ventilation Y形通风

e type ventilation e型通风

w-type ventilation w型通风

W type ventilation W形通风

forcing type ventilation 压入式通风

suction type ventilation 吸入式通风