En 12934 classifies fillings belonging to class I and IV as "new", since a percentage of other elements less than 5 % suggests that these fillings contain "new" feathers and down.

EN 12934对“新”填充物分类包括I级和IV级，如果其他原料少于5%，建议这些填充物标注“新”羽毛和羽绒。

youdao

I came to know him in September 1987 when Mr. Chen enrolled in my class on FORTRAN IV Programming, a three semesters' course.

我才知道他在1987年9月，当陈先生FORTRAN IV编程，有三个学期的课程在我的班级就读。

youdao

The Uptime Institute pioneered a widely adopted metric, with rankings from Tier I through Tier IV that quantify the reliability of megawatt-class power systems.

FORBES: New York, Black Swans, Blackouts and Anti-Fragile Grids