For less heavily polluted water, similar equipment is used, except that the glass tubes are coated with titanium dioxide.
对于那些污染不是很严重的水，也使用类似的设备，只是，玻璃管上涂有二氧化钛。
2
Jet pump may be all kinds of material, such as cast iron, steel, stainless steel, Hastelloy, titanium, ceramic, glass, plastics and graphite, and made of various sizes.