Feature, Utilizes, & Details

3 主題	3 帖子	15 積分

Rank: 1

發表於 2026-7-13 09:05:23 | 顯示全部樓層 |閱讀模式

As component of numerous carbon substances, hydrogen exists in all pet and vegetable tissue and in petroleum.

My page; nyjc h2 chem notes

回復