dud shell meaning in English

未爆炮弹

Whether all the dud shells in the shooting grounds mentioned in the answer to above will be cleared before the complete withdrawal of the british garrison , so as to protect the safety of the people in the territory
在是否仍然存在危险及英军全部撤退前会否清除在b项答覆所述的操炮区内所有未爆炸的弹头，以保
It is learnt that in the 1950 s and 1960 s , residents in sai kung were often killed or injured by the detonation of dud shells whilst picking shell cases in places such as kau sai chau , tiu chung chau , shelter island and basalt island
据悉，在五六十年代西贡居民经常在?西洲吊钟洲牛尾洲火石洲等地检拾弹壳时，被未爆炸的弹头炸死及炸伤。
Which of the shooting grounds mentioned in the answer to above have not yet been cleared , and whether an estimate has been made of the number of dud shells left behind in those shooting grounds , and whether these dud shells still pose a danger at present ; and
有哪些在a项答覆所述的操炮区仍然未被清理有否估计在该些操炮区内遗留下多少没有爆炸的弹头，及该些弹头现