左、右螺线紧密组合，用直心力骨进行连接，A4是指一条螺线内有4根力骨贯穿，A3的话是一条螺线内有三根力骨贯穿。
The left-wound and right-wound spirals are fitted Tightly together althernately and jointed with straight Rods. A4 uses 4 rods for one spiral to joint. A3 uses 3 rods for one spiral to joint.
特长
Advantages
1. 平滑表面，适合运送小件，不稳固之处理件。
Since the surface is flat and smooth ,the belts can Carry small items and unstable products.
2. 容许张力大，可运载重物件。
The allowable tension is high,so that heavy load Can be transported.
3. 网带抗坚强，可用于冲压作业。
The belt strength against pressure high,so that The belts can be used for processing under pressure.
4. 适用于高温作业。
The belts can be used at haigh temperature.
5. 可用于纤维制品之洗练、洗净工序。
The belt can be used for textile producs refining And cleaning process.
