楔形丝网
绕线管由V型线和支撑杆组成，采用世界上最先进的焊接工艺，每个交点具有焊接连接，结构坚固，机械性能好。 V形截面，避免堵塞，同时确保水流。连续间隙具有较大的水面积，同时降低了地下水的渗透率，避免了砂中较大的水压进入管内，形成了较好的滤砂。差距也可以根据不同的地质情况而改变。
绕线管（约翰逊管）的优点特点：
1.应用梯形电线，使屏幕间隙形成V形开口。设计比其他形式的产品运行更有效率，确保水资源顺利流通。
2.梯形丝连续卷绕在支撑线的圆形布置中，形成连续高密度均匀的间隙，确保筛网开口面积和不堵塞，并避免沉积物积聚的高密度，以提高提高生产效率，延长井口寿命，提供保证。
3.绕组和所有支撑线通过焊接连接，耐用，使用寿命更长。
4.根据实际需要设计的纵向排列的支撑丝和筛网的连续形式的间隙，使产品具有较高的压缩性能。
5.电线尺寸和连接也可根据不同需要生产
线宽（mm）1.2 1.5 2 2.2 3 3 3.2 4 4
线高（mm）2.2 2.5 3 4.5 5 6 6.5 7 7.5
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