zhì guǎn
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  • n.tubulation

    • shuǐ yā shì yàn jī shì zhì guǎn shēng chǎn xiàn shàng de yā lì jiǎn cè shè bèi

      水压试验制管生产线压力检测设备

      Hydrostatic tester is the pressure inspection equipment of pipe manufacturing production line.