| 摘要 |
<p>A blasting machine comprising two or more pressure tanks (1, 11) and a switching member (20) for selecting one out of the two or more pressure tanks that supplies grains to an injecting portion, whereby a continuous blasting operation is made possible. Furthermore, a sliding member (207) and a piston (208) are provided in a grain supplying valve (200) instead of a rubber bulkhead, whereby he leakage of grains and pressurized air is prevented. Moreover, reusable grains after a blasting process and dust ar <IMAGE></p> |
