| The principle of the suction type (sometimes called a gravity or |
| siphon type) is the same as an air gun for injecting paint or a |
| sprayer for ironing. The AM type and *Petit-blasting PM type |
| belong in this category. The mechanism is very simple but the |
| power is lower than that of a direct presure type. In many |
| cases, general air blasting means this suction type. |
| The abrasive media control is relatively easy compared with |
| other types, and this type may be applicable for precision |
| products. In that case, the machine will be expensive because |
| of the mechanisms included within the machine to enhance |
| precision. During continuous injection, refilling abrasive media |
| is easy. |
