波多野结衣一区二区三区高清-国产精品青青在线观看爽-黄污污网站-麻豆国产原创视频在线播放-青草网-色欲欲www成人网站

■ Gallium for the IIIA group elements, atomic weight 69.72.Gallium soft, light blue. Melting point of 29.78 ℃. Boiling point 2403 ℃. With non-toxic, non-volatile,non-flammable,non-explosive.It is an important element of doped silicon.
■ ≤ 2% light decay is within the detection range, can be regarded as no decay.
■  Specifications