国产精品综合视频,日本本亚洲三级在线播放,日韩三级αⅴ电影网站,久久国产香港三级,欧美一区中文字幕,好男人好资源在线视频观看影院,天天射天天爱天天干

Your Current Position:  PRODUCTS > Gum Rosin series > Gum Turpentine

Gum Turpentine

a If necessary the color can be determined by Pt-Co scale, super grade 0~35 (including 35), WW grade 35~70 (not including 35, including 70)
a If necessary the color can be determined by Pt-Co scale, super grade 0~35 (including 35), WW grade 35~70 (not including 35, including 70)
b Pinene content is the total content of α-pinene and β-piene.
c The value of fraction volume distillated at 170℃ is described as %