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试行标准
econ.
tentative standard
el.mach.
draft standard
met.
A. S. T. M. Tentative Standard ASTM
patents.
prestandard
tech.
tentative specification
ASTM 试行标准
met.
ASTM Tentative Standard
试行标准:
7 phrases
in 4 subjects
Aviation
1
Earth sciences
1
Metallurgy
3
Technology
2
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