| 摘要 |
measuring first and second frequencies during unloading and loading and storing the first and second frequencies in a nonvolatile memory; calculating a weight calculation standard expression using the frequencies stored in the nonvolatile memory; and obtaining an amount of variation between a third frequency before a roller of a turn table passes through a weight sensor and a fourth frequency upon passing, adopting the amount of variation in the weight calculation standard expression, and measuring weight of heated material.
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