Netzsch Technologies India Pvt Ltd. Offers Laboratory Top Mill. The Laboratory Top Mill is a basic machine type used for processing different products in batch operation. The batch size varies from about 1 to 12 I. The Laboratory Top Mill is very easy to handle and can be quickly and thoroughly cleaned. The Laboratory Top Mill excels by minimal product loss at the end of a batch. Little product is lost because of the rotational operation of the totally enclosed grinding basket and because the residual product is spun off.