The article introduces copper water jacket applied in lead tapping port for top-blown lead smelting furnace with oxygen enrichment,analyzes the injured mechanism of the copper water jacket,discusses the material and structure optimization scheme of the copper water jacket,demonstrates the application effect during the practical production.

This paper discusses calculation method of drawing water pipe as siphon,and proposes easy method of hydraulic calculation of pipe to let water out as siphon.

This paper dcals with five kinds of new siphonic inlets of small-sized hydropower stations,which have good developing prospects,for they not only are simple in struture, reliable to work,convenient to manage and against freeze,but also are able to save the gate and headstock gear equipments that cost more to build.