Facilities that produce Category IV MCCs.

• 四；生产第四类监控化学品的设施;

Facilities that produce Category IV MCCs.的用法和样例：

例句

1. Henry IV usurped the throne of England.
   亨利四世篡夺了英国的王位。
2. This line is four times as long as that one.
   这条线是那条线的四倍长。