1.Installation: wall and ceiling
2.Set chain installation hole on the sprocket
3.With innovation planet gear system rear mounted mostly strengthen locking effect
4.Seamless suited end covers
4.The new type metal core brake system and one - way usedwinder can be extended to automatic descent system.5.4.5*6 loop chain and 5mm loop cord is available.
6The no-load tension is less than 0.5kg,max weight is 15kgand the rising tension is less than 4KG, which make the labor-saving to 80%
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