超碰在线观看过国产|久久久在线草AV|人人人人操人人人人|18禁成人污网站|亚洲图片视频小说|五月天综合网友自拍|福利精品在线观看|五月婷婷六月999|婷婷天堂avtt|兽x人八区成人网

■ 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