oil supplementary valve 补油阀

supplementary valve upper cover 辅助阀上盖

Supplementary loaded safety valve 带补充载荷的安全阀 ; 带增补荷重的安全阀 ; 带增补载荷的安全阀 ; 带补充载荷的

automatic supplementary air valve 自动补充气阀 ; [机] 自动补充空气阀 ; 自动弥补气阀 ; 不佣人的劳力增补气阀

supplementary valve rod 辅助阀杆

supplementary valve piston 辅助阀活塞

supplementary valve sleeve 辅助阀套

supplementary valve body assembly 辅助阀体组成

supplementary feed valve 补充阀