Study on properties of vulcanizates of natural rubber br gutta 杜仲膠并用膠性能的研究
Properties of p sbr 并用膠的性能
The phony bills are made by replacing the middle strip of genuine notes with a color photocopy , and securing them with tape 這些假鈔是用彩色復(fù)印品代替真鈔的中間一段,并用膠條粘牢。