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当前学科:射线检测
题目:
单选
锻件法兰对接焊缝射线照相,提高照相质量最重要的措施是()
A . 提高管电压增大宽容度
B . 使用梯噪比高的胶片
C . 使用屏蔽板减少“边蚀”
D . 增大焦距提高小裂纹检出率
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