化学致癌剂

多种多样的化学致癌物如苯、吸烟、亚硝酸盐都能够引起(和)或促进肿瘤的发生。

Mitsubishi Chemical

chemical agent

chemical shift

covalent bond ( chemical bond )

chemical aspects in the coating of paraffin wax with paraffin wax

non-standard chemical machinery

coal chemical industry【化工】

chemical stoneware