垂直板式蝶阀: ertical disc type butterfly alevertical disc type butterfly valve
拖拉机和农林坏车轮扭转疲劳试验方法: wheels torsion fatigue test methods for tractors agricultural and forestry machines
幅: Ⅰ名词1.(布帛、呢绒等的宽度) width of cloth 短语和例子单 [双] 幅 cloth material of single [double] width2.(泛指宽度) width; size 短语和例子振幅 amplitude; 全幅 whole piece of material3.(姓氏) a surname 短语和例子幅仲 fu zhongⅡ量词(用
