钻柱在井下的受力极度复杂，甚至工作在腐蚀性介质中。
The pressure of the under well drill rod which even works in the caustic medium is extremely complex.
不锈钢在高温高粘稠或腐蚀性介质过滤元件，如聚合物冶炼。
Stainless steel filter elements for highly viscous or aggressive media at high temperatures, eg polymer smelts.
流量控制器：对于高温，对腐蚀性介质，在特殊材料和特殊设计。
Flow controllers: for high temperatures, for aggressive media, in special materials and special designs.
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