欧美aaaaa喷水,在线观看中文字幕2021,成人在线视频免费看,国产日产久久,日韩av免费一区,在线欧美a,成人午夜精品一级毛片欧美

Welcome toChangzhou Tianrong Testing Technology Co., Ltd！ Home |  Contact

hand twist tester

hand twist tester
hand twist tester
Detailed instructions：

Summarize

Used for testing the twist of roving.

Standards:GB/T2543.1 ISO2061

Technical parameter

image