Marking JL and quality class.

标记JL和质量等级。

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The value of tightening torque is relative not only to the nominal diameter and quality class of the bolt, but also to the security of the threaded fastener.

指出螺栓联接的扭紧力矩值不仅与螺栓的公称直径及性能等级有关，还与能否保证联接可靠工作有关。

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It is also one of the remarkable characteristics in English class teaching and one of the marks for the quality class teaching, which shows an orientation to improve the English teaching in China.

师生在课堂上都说英语，这已是英语课堂教学的显著特征和优秀课堂教学的重要标志之一，也是提高我国英语教学的方向。

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Today -- today, living a quality middle class life starts, as it always has, with a good-paying job.

WHITEHOUSE: Key Investments for Middle-Class Families

This initiative will not only lead to cost savings for homeowners and reduce negative environmental impact, but will also be a powerful vehicle for economic recovery by creating quality middle class jobs and lasting neighborhood benefits.

WHITEHOUSE: THE WHITE HOUSE

At the core of the Fidelio SoundBar are high quality TI Class-D amplifiers - with a built-in DAC - powered by a compact SMPS (Switch-Mode-Power-Supply) to provide a full digital architecture, delivering highly efficient audio amplification and premium audio quality.

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