Figure 1 shows a product part produced by our company. The material is 20-φ40mm±0.15mm×φ35mm×3000 times T-GB/T3639-2000. The symmetry of the two ends of the keyway relative to the reference A is 0.06. Mm is the product that meets the installation requirements. In the past, both ends of the keyway were milled, with low productivity and labor intensity.
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Shenzhen Poolux Lighting Co., Ltd. , https://www.pooluxled.com