... glue, bonding costs. 3, high durability, advanced materials used for the import of stainless steel, high wear-resistant delrin, APS ... engineering materials, used properly, can be used for 20 years. 4, low water pressure, flow science, applied ... , duck, captivity, fed on water use. 5, high practicality, value for money, precision CNC manufacturing 6, watertight, impervious to ensure the ...