Studies on firework compositions (II) Combustion characteristics of piled firework compositions;gerbs,star grains and star compositions as powder(*in Japanese)±ì²Ð¸¶ÎÁ²ÐÌô¤Î¸¦µæ¡ÊÂè2Êó¡Ë ²Ð¤ÎÊ´ºÞ¡¢À±ºÞ¡¢¿§²ÐºÞ¤ÎÂçÎÌdz¾Æ
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