若何识别水电图纸(国外英文资料).docVIP

如何识别水电图纸(国外英文资料) How to identify hydropower drawings.Txt The width of the same drawing should be properly classified, not too much. According to different purposes, line type can be divided into the following 6 types: 1: solid line electrical lines and main contents of a line by line, visible contour line, frame line etc.. The solid line: electrical construction drawings of the trunk and branch, cable, overhead lines are used in the painting line. For example, the middle of the telephone line is the letter F, and the middle of the broadcast line is the letter S. The fine lines: two lines, general line. Electrical construction drawings of base line (i.e. construction plan) to thin lines are used to highlight the electrical circuit in solid painting. The dash for the axis, the center line, such as the center line installation drawing large electrical equipment. The dotted line for auxiliary line, shielding wire, mechanical connection line, no visible contour line, invisible wires, plans to expand content lines. No break line used in a disconnected portion of the boundary line. In addition, commonly used in electrical professional lines are telephone lines, grounding buses, television antennas, lightning lines and other special forms. Add a qualified symbol or literal symbol on the line to indicate the use, forming a new line symbol. For example: M, said for the busbar; - L - for cable tray - B - is expressed as the broadcast line; R, expressed as a TV line - A - said the fire line; F, said mark for the telephone line 4. fonts and sizes (1) ink drawing should be taken straight long long word. Various letters and numbers written in the picture can be used in italic type with a tilt to the right and a horizontal angle of 75 degrees. When mixed and Chinese characters when writing, can be used straight, but the physical symbol is recommended in italics. The strokes of Chinese characters are approximately 1/15 of the word height. All kinds of letters and numbers of stroke