欧洲grand老妇人bbw,亚洲欧美成人综合久久久,国产人妻人伦精品无码.麻豆,色综合久久精品亚洲国产

Bellow Material Applications: Widely used in NC machine tools, electronic equipment, stone machinery, glass machinery, injection molding machine, manipulator, lifting equipment, automated warehouse and some precision testing instruments, and can keep equipment from dust, impurities and corrosive gas pollution. Characteristics: 1)No deformation with hard objects, long service life, good sealing and light operation. 2) The scaling ratio can be greater than 10:1. 3) It is resistant to coolant, oil, wheel foam and high temperature, etc. The bellows speed can reach 200m/min.