HB 4988.1-1988 Mechanical processing standard parts labor time standard general rules

HB 4988.2-1988 Mechanical processing standard parts labor time standards for bolts, screws, studs, pins, and rivets HB 4988.3-1988 Mechanical processing standard parts labor time standards for nuts, washers, bushings, and flange connectors HB 4988.4-1988 Mechanical processing standard parts labor time standard typical piece

GB/T 1.2-2002 Directives for standardization—Part 2:Methodology for the content of normative technical elements in standards GB/T 1.2-2020 Directives for standardization—Part 2:Drafting rules of standardizing documents based on ISO/IEC standardizing documents HB 4986.1-1988 Mechanical processing labor time standard for fixed-term work general provisions HB 4986.5-1988 Mechanical processing labor time standard for machining operations (pull) HB 4986.11-1988 Machine processing labor standard time for the job of using a plough. (Cowhide scraper) HB 4986.13-1988 Machine processing labor time standard for insertion HB 4986.2-1988 Mechanical processing labor time standard for ordinary lathes HB 4986.3-1988 Mechanical processing labor standard time for six-sided machining HB 4986.4-1988 Mechanical processing labor time standard for milling HB 4986.6-1988 Machine processing labor time standard for grinding HB 4986.7-1988 Machine Processing Labor Quota Time Standards - Drilling HB 4986.8-1988 Mechanical processing labor time standard for wrenches HB 4986.9-1988 Machine Processing Labor Quota Time Standards - Boring HB 4986.10-1988 Machine processing labor time standard for fixed-bed lathes HB 4986.12-1988 Machine Tooling Labor Quota Time Standards, Bridge Mills