山下工業研究所（2ヶ国語）

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To make the tools stronger and more durable, proper heat treat-ment is critically important. The temperature and the time of the heat treatment are strictly regu-lated by a very accurate control device.Our products are periodically checked at each production process by inspection devices. Highly accurate 3-D measuring instruments are used to inspect and confirm dimensions. ■ HEAT TREATMENT PROCESS■ INSPECTIONMaking of Ko-ken products005

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