Jiangcheng tshuab cav, lub Hoobkas suav, muaj ntau dua 30 xyoo ntawm kev tsim cov twj thiab li qub. Cog lus rau kev tshawb fawb txog kev tshaj lij thiab kev tsim khoom ntawm cov twj hydraulic thiab cov khoom siv hydraulic li qub. Nws cov khoom yog exported rau ntau lub tebchaws. Lawv yog cov ntseeg tau zoo thiab muaj kev qhuas dav. Yog tias tsim nyog, thov koj xav tiv tauj peb.
