| 摘要 |
PROBLEM TO BE SOLVED: To control the specific gravity of a blasting material of a thermosetting resin by preventing electrostatic charge thereof. SOLUTION: A conductive fiber, powder and grain, or particulate is blended with the thermosetting resin to form the blasting material. The conductive fiber, powder and grain, or particulate consists of metal, and is a metal oxide, and an iron oxide.
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