百万分之一当量的英文

• equivalent per million epm

• 百万:    million a very great number; ...
• 一:    one
• 当量:    equivalent; equivalent weigh ...
• 百万分之一:    fpir first piece inspection report; micro one millionth part; micron; mμ; one in a million; parts per million ppm; ppm part per million; ppm parts per million; ppm percent per million; volume per million
• 百万分之当量:    equivalent per million epm; equivalentpermillion