I crawled under the house and crept into a dark hollow of a brick chimney . 我爬到屋子底下，钻进了砖烟囱的黑窟窿里。
2.
Demolition of two brick chimneys by directional blasting 两座砖烟囱定向爆破拆除
3.
The demolition of a 40m - high brick chimney by directional blasting 高砖烟囱定向控制爆破拆除
4.
Directional blasting of 65 m - high brick chimney 高砖烟囱定向爆破
5.
Demolition of a leaning brick - structural chimney by directional blasting 倾斜砖烟囱的定向爆破拆除
6.
Demolition of a 36m - high brick water tower by directional folding blasting 砖烟囱集团装药定向爆破拆除
7.
Considering the situation that the chimney was weathered seriously and the strength was so lower that single charge and blasting delay interval should be well - chosen especially 对风化严重等强度低的砖烟囱进行爆破拆除时，尤其要控制单响起爆药量与起爆的间隔时间。
