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A piano manufacturer employs piano technicians who inspect instruments before they are shipped to customers: a. When inspecting an instrument, Technicians apply specific Inspection Tests; more than one Test can be applied for an inspection. Each piano is inspected by at least one technician, and a technician can inspect more than one instrument. b. Inspection Test has a Test Number and Description. Some Tests are combinations of other Tests; a particular Test can be included in multiple combined Tests. c. Technicians are described by Employee ID and Name. d. Each instrument has a unique Instrument ID, manufacturing date, and instrument brand. e. For every time a technician inspects an instrument using a specific test we need to keep in the database the date of inspection and evaluation grade.

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