So it is a necessary means to find a kind of non erosion low temperature medium instead of salt water.
那么寻找一种无侵蚀的低温介质替换盐水，成为解决题目的必要手段之一。
In the low temperature, corrosive medium or vacuum conditions, with special performance should be considered the gasket.
在低温，腐蚀性介质或真空条件下，应考虑具有特殊性能的密封垫。
Low and medium temperature heaters have wing shape heating elements and high temperature heater has tubular heating elements.
低、中温型加热器采用翅片式电热元件，高温加热器采用管状元件。
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