WXP Type High Temperature Smoke-exhausting Ventilator in Fire-control FSD Type Tunnel Ejective-flow Ventilator MQ Type Coal Gas Turbo Centrifugal Blower L4-72 Type Special Centrifugal Grain Depot Ventilator WXP Type High Temperature Smoke-exhausting Ventilator in Fire-control T35-11, BT35-11 Axial-flow Ventilator 4-62 Type Plastic Centrifugal Ventilator GG1-15 ~ GG35-15, GY1-15 ~ GY35-15 Type Centrifugal M5-29 Type Centrifugal Coal-dust Ventilator C4-73 Type Centrifugal Dust Ventilator