Letter symbols for physical quantities - Symbols for general use
物理量的字母符号；通用符号

1994-03-01

Letter symbols for physical quantities - Symbols for use in meteorology and geophysics
物理量的字母符号；气象学和地球物理学中使用的符号

1989-09-01

Letter symbols for physical quantities - Symbols to be used for electrical machines
物理量的字母符号；电机用符号

1991-01-01

Letter symbols for physical quantities - Symbols for use in electric power engineering
物理量用字母符号.电力工程用符号

1989-03-01

Letter symbols for physical quantities; symbols for use in the field of static converters using semiconductor devices
物理量的字母符号；使用半导体器件的静态转换器领域用符号

1994-02-01