RDC-05 Door Top Liquid Gearing 2 Section Door Closer. ◆Door closing speed can be adjusted from 180?30?0?◆Suitable for both left or right opening,opening angle:180?◆1 is for adjusting closing speed from:180?30?◆2 is for adjusting closing speed from:30?0?◆Pass the quality test of 300 thousand cycles
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