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 pwm muaj ob yam tseem ceeb, txhaj tshuaj pwm (A phaj) thiab ejector pwm (B phaj).Cov khoom no tseem hu ua moulder thiab mouldmaker.Yas resin nkag mus rau hauv pwm los ntawm ib tug sprue los yog rooj vag nyob rau hauv lub txhaj pwm;lub sprue bushing yog kaw nruj nreem tiv thaiv lub nozzle ntawm txhaj tshuaj ntawm lub tshuab molding thiab tso cai rau molten yas ntws los ntawm lub thoob rau hauv pwm, los yog kab noj hniav.Lub sprue bushing coj cov yas molten rau hauv kab noj hniav img los ntawm cov kab uas tau muab tshuab rau hauv lub ntsej muag ntawm A thiab B daim hlau.Cov channel no tso cai rau cov yas khiav raws lawv, yog li lawv raug hu ua cov neeg khiav dej num.Cov yas molten ntws los ntawm cov neeg khiav dej num thiab nkag mus rau ib lossis ntau lub rooj vag tshwj xeeb thiab mus rau hauv kab noj hniav geometry los ua qhov xav tau.
Thaum kwv yees tus thawj haiv neeg ntawm North America thaum lub sij hawm ntawm European kev sib cuag yog ib qho nyuaj, ib qho kev sim ua nyob rau hauv thaum ntxov ib feem ntawm lub xyoo pua nees nkaum los ntawm James Mooney siv cov ntaub ntawv keeb kwm los kwv yees cov neeg hauv paus txawm nyob rau sab qaum teb ntawm Mexico nyob rau hauv 1600. Nyob rau hauv ntau tsis ntev los no xyoo, Douglas H. Ubelaker ntawm Smithsonian Institution tau hloov kho cov duab no.Thaum Ubelaker kwv yees tias muaj cov pej xeem ntawm 92,916 nyob rau sab qab teb Atlantic xeev thiab cov pej xeem ntawm 473,616 hauv Gulf xeev, feem ntau cov kws tshawb fawb suav tias cov duab qis dhau.
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