国产一级a毛一级a看免费视频,久久久久久国产一级AV片,免费一级做a爰片久久毛片潮,国产精品女人精品久久久天天,99久久久无码国产精品免费了

A21型燃燒趨勢測試儀

Apparatus to conduct the A.21/O.2 test to measure the potential for a liquid substance to increase the burning rate or burning intensity of a combustible substance. Apparatus for determining the effects of igniting the substance under confinement , according to the UN Recommendations on the TRANSPORT OF DANGEROUS GOODS, Manual of Tests and Criteria, Test Test 2 (c) (i).2.