| 摘要 |
A multi-layer twisted strand or cable (1) comprising one central elongate element (11) surrounded by three layers of elongate elements, namely an inner layer, a middle layer and an outer layer.
Said elongate elements are wires or strands of twisted wires.
The surround elongate elements have several different sizes of area of transversal cross section thereof. The middle layer comprises elongate elements (12,14) of different size of area within the middle layer and the sizes of area of the elongate elements between the layers are different. The outer surround elongate elements (15) having the largest size of area. The outer surround elongate elements have a smoothened outer surface (152), so that the twisted strand or cable (1) has a smooth and satiny outer surface (152).
All surround elongate elements (13,12,14,15) having the same lay direction and the same pitch. Elongation when stretch force is exerted on the twisted strand or cable and friction and abrasion caused by pulling the twisted strand or cable is reduced. |
