Complex sentence: Between 1797 and 1799 Bodoni and the Amoretti were struggling to acquire orders from Milan's National Printing House; when Lorenzo Manini was head of the Milanese workshop, the Amoretti received requests for large amounts of types and printing presses.
Split into simpler sentences: Between 1797 and 1799 Bodoni and the Amorettis were struggling to acquire orders from Milan's National Printing House. When Lorenzo Manini was head of the Milanese workshop, the Amoretti received requests for big amounts of types and printing presses.