Study on the Frequently-used data of power engineering design

Presents the revising principle and application scope of the national building standard design drawings 13R503 Frequently-used data of power engineering design, and describes the simplification, regulation and supplement in detail. All data listed in the drawings have clear source which can be found by anyone if needed. Meanwhile, the original data are corrected and identified in time according to related tabulation method. Moreover, gives special explanation for the added content and how to use tables in the drawings.