This is why you will frequently find that our instruments, especially craniotomes, are packed in QP tubes, in addition o an outer tubular bag which guarantees clear legibility of the label.

这就是我们的产品(尤其是开颅器)为什么除了外包装外，常常还有QP管包装的原因，这样也可以保证标签清晰易辨。

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Relevant operation practice has proven that with the optimalized sizing process parameters, steel tubes sized by the said mill possess decreased ovality and higher O. D. accuracy.

生产实践表明，采用优化后的定径工艺参数，钢管的椭圆度减小，外径精度提高。

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