в полузаводском масштабе
• Preparation of 2,3-butanediol has been by fermentation on a pilot plant basis (or on a pilot scale).
Источник:
Русско-английский научно-технический словарь
на Gufo.me
• Preparation of 2,3-butanediol has been by fermentation on a pilot plant basis (or on a pilot scale).