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| กิจกรรมการบริการ (A schedulable appointment to provide a service to a customer. A service activity uses one or more resources to perform a service at a specific time and place) | |||
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| กิจกรรมการบริการ (A schedulable appointment to provide a service to a customer. A service activity uses one or more resources to perform a service at a specific time and place) | |||