| 摘要 |
<p>A borehole plug suitable for forming a deck for supporting explosives at a desired level in a borehole, comprising two or more co-reagents (3, 4) contained in a manner such that they are not inadvertently mixed but are mixable when so required. The co-reagents are further contained in an outer container (2) which is adapted to retain them when mixed and is dimensioned for dropping down a borehole.</p> |
