Resistance chaw vuam, feem ntau hu ua qhov chaw vuam, yog cov txheej txheem vuam siv dav uas koom nrog ob lossis ntau dua cov ntawv hlau los ntawm kev siv lub zog thiab hluav taws xob tam sim no los tsim kev sib cog lus ntawm cov ntsiab lus tshwj xeeb. Cov txheej txheem no feem ntau siv nyob rau hauv ntau yam lag luam, suav nrog automotive, aerospace, a ...
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