特殊用法ball clack1.球瓣， 球形阀butterfly clack1.蝶形瓣， 蝶形活门exhaust clack1.排气瓣， 排气活门inlet clack1.吸入瓣pressure clack1.压力瓣suction clack1.吸瓣shutting clack1.闭断瓣valve clack1.阀瓣