manual butterfly valve
常见例句
- It does not need large-diameter bottom cover to discharge dry cake, generally only with ball valve or butterfly valve. The valves can be electric or pneumatic, or manual.
底部不需大直径的排干滤饼底盖，只用球阀或蝶阀，这些阀门可以是电动，或者气动，或者手动。 返回 manual butterfly valve