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parts per thousand
auto.
千分之
几
率
;
千分率
;
千分之…
chem.
千分之一
10—3
earth.sc.
每千分之......
el.
千分之一
10-3
oil
千分之几
water.res., ecol.
千分之一
part
s
per thousand
el.
千分率
;
千分之…
part per thousand
agric.
千分之一
(ppt)
English thesaurus
parts per thousand
abbr.
ppm
(million
Vosoni
)
chem., abbr.
ppth
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