单项选择题
A.0.01mm B.0.02mm C.0.05mm
A.0~30℃ B.10~35℃ C.5~40℃
A.1MPa B.5MPa C.10MPa D.50MPa
A.3~30Mpa B.在0.00025~0.0025/S C.1~10MPa/s
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