国产无遮挡又黄又爽在线视频,国产亚洲成AV人片在线观看,伊伊人成亚洲综合人网7777,中文有码vs无码人妻

×

YG815D-IV flame-retardant tester of fabric (Less than 45°)

Video
Gallery
360°Show
×
×
×
Applicable scope
Test principles and standards
Instrument characteristics
Configuration list
It is used to determine the damage area and damage length of the textile material under 45° and the number of contact flames when the textiles are heated to the specified length in the state of 45°.
GB/T14645