You can see a little bit of a slowdown there in the mid-'70s, but it matches up pretty well with the Second Industrial Revolution, when factories were learning how to electrify their operations.
70年代半ばに少し停滞が見られます 第二次産業革命の時にも同様の停滞がありました 工場をどう電化するべきかを模索した時期に相当します