Instruction manual

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B12 72201469 螺钉，M4X14,GB819 SCREW 6
B13 142884 紧定螺钉，M3X8,GB79-85 SLOT SCREW 4
B14 72201468 螺钉，M3X6,GB819 SCREW 2
B15 133022 齿垫 ￠4 WASHERS 2