Chang Lan fastener manufacturing co., LTD (tom qab no hu ua Chang Lan), tom qab xyoo ntawm txoj kev loj hlob, lub tuam txhab tau tsim nyob rau hauv 2011, yav tas los hu ua Chang He fastener Hoobkas, yog ib tug loj yongnian txheem fastener manufacturing tuam txhab, lub tuam txhab nyob rau hauv nyob rau hauv lub chaw faib khoom loj tshaj plaws rau cov qauv - hebei xeev YongNian, npog thaj tsam ntawm ntau tshaj 6000 square meters, ze rau 107 lub teb chaws txoj kev loj thiab beijing-guangzhou railway, kev thauj mus los yog yooj yim, qhov chaw zoo heev.
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