线环 looP 缝纫机缝纫时形成线环的特征，是机针带引缝线穿过缝料下降至最低位置后，当机针再次回升一定距离时，针眼附近的缝线被针眼抬起弯曲形成的一个环形图，这个环形圈称为线环。
这种织物组织的优点是线环可以使用所有的织物经纱，因而显著提高了边缝抗拉强度。
This fabric structure has the advantage that it is possible to use all of the fabric warp yarns in the loops, thus significantly increasing the tensile strength of the seam.
使主线在持竿者前面滚动出线。主线会形成一个环形，并要使得线环在落水前直伸开来。
Let your fly line roll out in front of you. Your line should for a loop and then straighten out before laying on the water.
然后，利用图像化的地层、重力、化探、线环构造和遥感影像数据进行RGB合成，通过HIS变换进行多源地学数据融合。
These image data and remote sensing image can be integrated in RGB form and then be transformed into HIS to merge the geological data.
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