Dongguan Enuo pwm Co., Ltd yog ib lub koom haum ntawm Hong Kong BHD Group, yas pwm tsim thiab kev tsim khoom yog lawv cov lag luam tseem ceeb.Tsis tas li ntawd, hlau qhov chaw CNC machining, qauv khoom R & D, tshuaj xyuas fixture / Gauge R&D, yas khoom molding, txau thiab sib dhos kuj tseem koom nrog.
Cov cuab yeej tuag casting tau tsim nyob rau xyoo 1838 rau lub hom phiaj ntawm kev tsim cov khoom txav mus rau kev lag luam luam ntawv.Thawj tuag casting-txog patent tau tso cai rau xyoo 1849 rau lub tshuab ua haujlwm me me rau lub hom phiaj ntawm kev siv tshuab luam ntawv ntau lawm.Nyob rau hauv 1885 Otto Mergenthaler tau tsim lub tshuab Linotype, ib qho khoom siv hom-casting uas tau los ua cov khoom tseem ceeb hauv kev lag luam luam tawm.Lub tshuab Soss tuag-casting, tsim nyob rau hauv Brooklyn, NY, yog thawj lub tshuab raug muag nyob rau hauv qhib khw hauv North America.Lwm daim ntawv thov tau loj hlob sai, nrog kev tuag casting pab txhawb kev loj hlob ntawm cov neeg siv khoom thiab cov khoom siv los ntawm kev tsim cov khoom tsim nyog ntawm cov khoom sib txawv hauv cov ntim siab.Xyoo 1966, General Motors tau tso tawm cov txheej txheem Acurad.
Nyob rau hauv 800 lub teb chaws Yelemees, tus huab tais Frankish Charlemagne tau crowned emperor thiab nrhiav tau lub Carolingian faj tim teb chaws, uas tau muab faib nyob rau hauv 843 ntawm nws cov qub txeeg qub teg.Tom qab kev tawg ntawm Frankish Realm, rau 900 xyoo, keeb kwm ntawm lub teb chaws Yelemees tau intertwined nrog keeb kwm ntawm lub Holy Roman faj tim teb chaws, uas tom qab tshwm sim los ntawm sab hnub tuaj feem ntawm Charlemagne lub qub teb chaws Ottoman.Thaj chaw pib hu ua East Francia stretched ntawm Rhine nyob rau sab hnub poob mus rau Elbe River nyob rau sab hnub tuaj thiab los ntawm North Hiav Txwv mus rau Alps.
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