ʻO nā mea like ʻole e pili ana i ke kumu hoʻohālikelike 1. Nā waiwai o ka ʻili Ma muli o ka pollution, ka mālama ʻana i ka wela kemika, electroplating a me nā lubricants, a me nā mea ʻē aʻe, he kiʻiʻoniʻoni ʻili lahilahi loa (e like me ka film oxide, sulfide film, phosphide film, chloride film, indium film, cadmium film. , alumini film, etc.) no...
Heluhelu hou aku