A cast iron sizzle plate none-too-subtlely shaped like a cow has a heavy slug of oil applied to it before being placed on a ferocious gas flame.

So one-dimensional elastic wave and plate vibration response theory are mainly applied to study the structure and experiments are made to verify the validity of the theory.

The new type of all-welded plate & shell heat exchanger combining the advantages of plate, shell & pipe heat exchanger has been applied in industry and shipbuilding.