| http://www.w3.org/ns/prov#value | - In the event the housing is made from steel which, as well known, possesses a special positive expansion under temperature effects, then if the material of the catalyzator does not have an excessively negative expansion under temperature, which is usually the case, then there is a considerable relative movement between the free or unsecured end of the catalyzator, on one hand, and between the end
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