guarded bed造句

• The sulphur guard beds contain an adsorbent that converts the mercaptans present at trace levels in the heavy naphtha product , and chemically binds the sulphur in the form of stable metal sulphides
  硫保护床装有一种吸附剂，它能把重石脑油产品中存在的微量硫醇转化，并通过化学键使硫以稳定金属硫化物的形式存在。