Which statements about creep forming is correct?

A.A workpiece is loaded against a die or tool for a specific time

B.The load is normally applied using pressure or vacuum at temp. around 600°C

C.The process results in predetermined shapes that required little or no machining

D.No

正确答案：A workpiece is loaded against a die or tool for a specific time；The process results in predetermined shapes that required little or no machining