The WSTK contractservice is used to establish whether the user of a service has a valid contract in place, the contract identifier is then referenced on the meter records.
WSTK合同服务用来确定服务的用户是否拥有一个有效的合同，之后合同标识符将在评测记录中被引用。
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On the other hand, in order to obtain larger market share and to get more benefits for owners, the enterprises should provide project management and general contractservice.
Though UPS had continued to expand its retail store services throughout the 1930s and 1940s, by the early 1950s it was clear that contractservice to retail stores was limited.