球式单向阀球形节省阀 球形止回阀球形节流阀落球式止回阀球止回阀止回球阀球形单向阀钢球单向阀
Spherical check valve, spherical saving valve, spherical check valve, spherical throttle valve, falling ball check valve, ball check valve, check ball valve, spherical check valve, steel ball check valve
以上为机器翻译结果，长、整句建议使用 人工翻译 。