抽排软管和接头
Easy connection and disconnection of vacuum hoses.
透明聚氨酯软管，t = 0.4.用嵌入钢螺旋强化。
透明聚氨酯软管，t = 0.7.用嵌入钢螺旋强化。
Transparent polyurethane hose, t = 1.2. Reinforced with embedded steel helix.