Gb	Eng
锅炉内壁要洗刷一下，除去钙质沉淀物。	The boilers will have to be scoured out to remove the calcium deposits.
因为除去钢中的磷和硫需要一些特殊的条件，这些条件只有碱性法才能满足。	Because the removal of phosphorus and sulfur require special condition that can be met only by the basic process.