短語詞組短語ballhead pilot valve plunger 球頭導(dǎo)閥柱塞pilot valve plunger 先導(dǎo)閥柱塞hydraulic pilot valve plunger 液壓先導(dǎo)閥柱塞pilot valve plunger movement 先導(dǎo)閥柱塞的運動pilot valve plunger control position 先導(dǎo)閥柱塞控制位置pilot valve plunger compensation land 先導(dǎo)閥柱塞補償閥麪speed setting pilot valve plunger 速度設(shè)定先導(dǎo)閥柱塞 返回 plunger pilot valve