There are various types of lines on the drawing such as: border lines, visible lines, invisible lines, break lines, phantom lines.
图上有各种形式的线条，诸如：边框线、实线、虚线、剖面线、中心线、引出线、尺寸线、断裂线、假想线。
Vee Orifice option is shown on drawing with phantom lines. Flow must be from side opposite the seat.
形流道选项在图中用虚线显示。流体必须从阀座的侧对面流过。
Vee Orifice option is shown on drawing with phantom lines.
形流道选项在图中用虚线显示。
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