精品一二区,九九九九九九精品,国产综合久久久,日产精品久久久一区二区开放时间,av一二三区,国产精品久久久久影院色老大,欧美在线免费视频

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 %