丰满少妇aaaaaa爰片毛片,久久久久亚洲精品无码蜜桃,免费大片av手机看片,无码精品a∨在线观看中文

×

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.