部分：单根铜心绝缘细电线或电缆的垂直燃烧试验方法。

Tests on electric cables under fire conditions Part 2 : Test on a single small vertical insulated copper wire or cable.

youdao

部分：单根铜心绝缘细电线或电缆的垂直燃烧试验方法。

Tests on electric cables under fire conditions Part 2 : Test on a single small vertical insulated copper wire or cable.

youdao