G.N.R. S.r.l.
GNR Ltd was estabilished in 1984 in Milan; the promoters were Mario Gungui, General manager, and Antonio Nigro, Technical Manager. In the same yer they took over OPTICA Ltd, one of the first and most well-known European companies in the field of Anal
Introduction
GNR Ltd was estabilished in 1984 in Milan; the promoters were Mario Gungui, General manager, and Antonio Nigro, Technical Manager. In the same yer they took over OPTICA Ltd, one of the first and most well-known European companies in the field of Anal...

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Yancheng Longsheng Fine Chemical Factory is a technology-based private chemical enterprise that integrates scientific research, development, production, and operation. It mainly engages in the production and operation of brominated alkane series and