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historigram | |||
record diagram | |||
log-diagram; recording curve |
记 录曲线 : 42 phrases in 11 subjects |
Air defense | 1 |
Automobiles | 3 |
Electric machinery | 1 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 4 |
Geophysics | 2 |
Metallurgy | 2 |
Oil / petroleum | 9 |
Steel production | 1 |
Technology | 17 |