免费大片a级毛片_国产不卡视频一区二区三区四区_免费人成网站在线免费观看_亚洲中文字幕永码永久在线

×

MB-8627 leather cracking test machine (leather breaking test machine)

Video
Gallery
360°Show
×
×
×
Applicable scope
Test principles and standards
Instrument characteristics
Configuration list
The test instrument in the upper leather and various thin leather, leather face of anti cracking index. In this clip frame fixed specimens of peripheral, with speed per minute is about 12mm, copper ball leather for top, when the surface cracks, the height of rising value, is the determination value of cracking.