垂直板式蝶阀: ertical disc type butterfly alevertical disc type butterfly valve
小型: small-sized; small-scale; miniature; minitype; pocket; pocketsize; compact type 短语和例子充分利用小型资源 make full use of limited resources; 小型公共汽车 [菲] jeepney; minibus; microbus; 小型货车 jubilee truck;
