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2011

Release time:

2021-09-14

<li class="f-18"><span class="f-18 en-b">★</span>In August, the flexible composite high-pressure transmission pipe and exhaust pipe connection device for the petroleum and natural gas industry met the national V standard exhaust pipe, and obtained the utility model patent certificate at the same time;</li>

In August, the flexible composite high-pressure transmission pipe and exhaust pipe connection device for the petroleum and natural gas industry met the national V standard exhaust pipe, and obtained the utility model patent certificate at the same time;

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