德美化工：公司皮革化学品主要包括铬鞣剂、复鞣剂、加脂剂等

Group 1 - The core viewpoint of the article is that the company, Dermei Chemical, has clarified its product offerings in the leather chemicals sector, which includes various types of tanning agents and finishing agents [1] Group 2 - The company's leather chemicals primarily consist of chromium tanning agents, re-tanning agents, fatliquors, degreasers, vegetable tanning agents, chrome-free tanning agents, and finishing agents [1]