相变

xiàng biàn wù zhì

相变物质

phase-change material

xiàng biàn cuò wèi

相变错位

phase transformation dislocation

zhēn kōng xiàng biàn guō lú shì fǒu huì míng xiǎn fā shēng yān qì dī wēn fǔ shí yī zhí zhòng shuō bù yī

真空相变锅炉是否会明显发生烟气低温腐蚀，一直众说不一。

It is uncertain all along that if the phase change vacuum boiler can be corroded obviously under super low temperature.