... blue core glass syringe 蓝芯玻璃注射器 blue flame burner 蓝焰灯 blue litmus paper 蓝石蕊指示剂条 ...
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Test B: Bunsen Burner A 3/8〞Bunsen burner was adjusted to a quiet flame with a 1-1/2〞inner blue cone and then overturned on the test material, exposing material to the flame for 5 minutes.
测试B：煤气喷灯。将一个3/8〞 的煤气喷灯调到稳定的火焰使其蓝色锥形内焰为1-1/2〞，然后，将煤气喷灯翻转，是火焰接触所测试的材料5分钟。
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