短語(yǔ)詞組短語(yǔ)spherical check valve 球形止廻閥spherical butterfly valve 球形蝶閥spherical l valve 球閥suspended spherical trap valve 浮球式疏水閥artificial spherical mitral valve 人造球形二尖瓣artificial l spherical mitral valve 人造球形二尖瓣semi -suspended spherical trap valve 半浮球式疏水閥a spherical valve 球形閥 返回 spherical valve