所有与液体接触的泵头部件，仍然没有金属材质的，这可以保证有最佳的耐腐蚀性。
All components of the pump head that are in contact with the fluid, are still metal-free, this is to assure optimum chemical resistance against aggressive fluids.
这样，改造标准泵浦的总成本中将要包括软管、接触液体部件的费用以及安装费，估计的金额是XXXX美元。
The total cost to modify the standard pump would include hoses, wetted components and installation for an estimated cost of XXXX.
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