English to Czech Tech/Engineering Metallurgy / Casting

Three years ago, XXXX looked like it would become the next swing plant—production capacity slowed down and only increased in times of market upswing.
===
At the bottom of the list lay the “swing” plant – the facility that, in times of low demand, didn’t generate enough money to please the yyyy in zzzzz.
===
Vidim to jako nevykonny zavod, jehoz produkce roste pouze v dobe, kdyz je na trhu takova poptavka, ze musi brat i od nich