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standard | |
commun. transp. | switchboard |
environ. | standard |
law pharma. environ. | standard |
med. | norma |
Cella | |
gen. | cell |
cella | |
agric. | cell |
chem. | shell |
Weston standard cell : 5 phrases in 3 subjects |
Accumulators | 1 |
Electronics | 2 |
Measuring instruments | 2 |