在订购对焊连接阀门时，要指定管道连接端口的管壁厚度，并且提供有关类型、型号和焊接端等高线等参数。
When ordering Butt Welding End valves, specify schedule of pipe end and give complete data concerning style, figure number and contour of weld end.
通常由等厚线(或等值线)构成等厚图，展示岩石单位的(与真垂直厚度相对的)地层厚度。
Commonly, the isopachs, or contours that make up an isopach map, display the stratigraphic thickness of a rock unit as opposed to the true vertical thickness.
等厚线是垂直于层理面的、真正的地层厚度。
Isopachs are true stratigraphic thicknesses; i. e., perpendicular to bedding surfaces.
等厚线是垂直于层理面的、真正的地层厚度。
Isopachs are true stratigraphic thicknesses; i. e., perpendicular to bedding surfaces.
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