أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Co-product = Main product + additional product (Both products are planned pdts. and are of equal importance)
By-product= Unplanned/Side product produced during production of main product (is of least importance if it can not be used as a raw material for any other process or industry)
