oil preheater是什么意思

用法例句

A kind of CT insert in tube which can be used on heavy oil preheater of utility boiler and gas turbine power plant was presented.

介绍一种管内ＣＴ插入物，它可直接在电站锅炉、油制气厂和燃机电厂现有重油预热器上加装。