日韩免费av,夜夜爱夜夜操,草草草在线视频,av色综合网站,日本少妇精品亚洲,日本午夜无人区毛片私人影院,久久伊人艹

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