| 摘要 |
Apparatus for loading an upwardly extending borehole with a fluent explosive, including a tubular member extending along a portion of its length into the borehole, a conduit axially extending into the external open end section of the tubular member to a point short of the borehole face, and means for collapsing the tubular member intermediate the end of the conduit therein and the borehole face.
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