成人性色生活片免费看成人性_国产成人精品亚洲日本在线_精品久久一区二区_亚洲综合久久久

Your Current Position:  PRODUCTS > Gum Rosin series > Light-Colored Rosin

Light-Colored Rosin

Light colored rosin is made by refining Rosin under certain temperature and vacuum conditions; It is used in electronic flux, light rosin resin and edible ester gum.