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Double-layer gas circuit nozzle for narrow-gap gas shielded welding
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Self-adaptive slag removal equipment
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Welding method for tower crane turntable support
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Clamp system control method and clamp system
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Stirring head for friction stir welding
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Stirring head capable of reducing welding seam flash of friction stir welding
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Minor diameter shaft shoulder stirring head
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Stirring head with shape change in stirring area for friction stir welding
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Convex stirring head for friction stir welding
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Stirring head with depth change in stirring area for friction stir welding
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Bottom convex stirring head for friction stir welding
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Stirring pin rotating profile outward convex type stirring head
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Stirring needle spiral groove density matching type stirring head
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Stirring needle spiral groove gradually-shallow stirring head
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Stirring needle spiral groove gradually-deepened stirring head
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Stirring needle helical groove gradually-dense stirring head
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Stirring head with convex-concave matching type stirring pin rotating profile
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Multi-layer forging and pressing type stirring head for friction stir welding
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Stirring needle helical groove gradually dredging type stirring head
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Stirring head with inwards concave rotating contour of stirring pin
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