emperors of the subsequent yuan dynasty . when the hongwu emperor , founder of the ming dynasty , proclaimed in that the elaborate and labor-intensive process of producing wax tea "overtaxed the people's strength" and decreed that all imperial tribute tea was to be in the form of loose leaves rather than...
the other when heated and shrink (contract) faster when cooled down from the brazing temperature. once the two different materials have been brazed together and cooling begins, the shrinkage-rate differences between those two materials can produce significant shear stresses at the brazed interface between...
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service. service provider's responsibility for the service as a rule, the service is available hours a day. however, the service provider shall be entitled to discontinue the service or its part temporarily due to maintenance, installation, change work, public order and safety, system overload or other...