Evaluation of Explosive Propeties by Underwater Explosion(II) Evaluation of Ability to Propagate a Explosion by the Variable Sample Test Using 30/40 Steel Tube(*in Japanese)¿åÃæÇúȯ¤òÍѤ¤¤¿ÇúȯÀ¤Îɾ²Á¡ÊII¡Ë 30/40¹Ý´É¤òÍѤ¤¤¿²ÄÊÑ»îÎÁÎ̻¤Ë¤è¤ëÅÁÇúÀɾ²Á