Yellow spider red spider Yellow spider red spider often clusters on the back of the day li
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Laser processing is a high-temperature thermal processing technique that uses a high-radiat…
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1 Introduction
Regardless of the quenching of the workpiece, the…
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[Keywords] side wall gantry double-head spot welding machine, single-sided…
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One must apply early and reapply
The seedling fertilizer is applied twice, the fi
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