词汇	gas proofing
释义	gas proofing 防气处理,不透气
随便看	check-valve ball check valve ball seat check-valve ball seat check valve ball spring check-valve ball spring check valve body check-valve body check valve body cap check-valve body cap check valve cap check-valve cap check valve case check-valve case check valve case gasket check-valve case gasket check valve clamp check-valve clamp check valve for hot water inlet check valve for lubrication system check valve for washing water check valve gland check-valve gland check valve guidance check-valve guidance Check valve guiding shall be plastic to plastic