Zhaoqing Gaoyao Xinying Hardware Products Co., Ltd
角度:(每个位置 15 度)
A:90-135 3 步
B:90-180 6 步
D:90-205 9 步
Angle: (15 degree for each position)
A:90-135 3Steps
B:90-180 6Steps
D:90-205 9Steps
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