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Or consider how Welch became involved in the excruciating details of the tubes that go into GE's X-ray and CAT-scan machines. Five years ago, Welch, who spends 15% to 20% of his time interacting with customers, heard some gripes about the poor quality of the tubes. The product was averaging little more than 25 000 scans, less than half what competing tubes were getting.

The main idea of the paragraph

Here is an example in which Welch got himself involved in resolving the quality problem of the tubes used in GE’s X-ray and CAT-scan machines five years ago.

五年前，通用电气生产的X射线扫描机以及计算机处理的X射线轴向分层造影扫描机上的显像管质量不很好，韦尔奇亲自参与解决其质量问题，这儿说的是这个例子。

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