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| at the coalface (The judges at the coal face must be robust. CME Alexander Demidov); at the coal face ("at the coalface" is more usual. Alexander Demidov) | |||
| in the trenches (Beloshapkina) | |||
| on the front lines (slitely_mad); up-front; on the front (по контексту Moscowtran); at the front line (Andrey Truhachev); on the front line (Andrey Truhachev) | |||
| на передовой: 94 do fraz, 21 tematyki |