对于成型4L塑料制品的吹塑设备,其载模力大约为()
A. 50bar左右
B. 500bar以上
C. 120bar左右
D. 以上均不正确
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Magnetic information on a chart may be ().
A. found in the center(s) of the compass rose(s)
B. indicated by isogonic lines
C. found in a note on the chart
D. All of the above