pack (a blast hole) full of clay or sand to concentrate the force of the explosion
(用沙土)封(炮眼)
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when the hole was tamped to the top, gunpowder was inserted. 当炮眼被封到顶时,把火药塞进去。
[with obj. and adverbial of direction]ram or pack (a substance) down or into something firmly
夯实(物质);拍实
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he tamped down the tobacco with his thumb. 他用拇指把烟丝按实。
"early 19th cent.: probably a back-formation from