2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub tshuab nrhiav hluav taws xob tau tsim thiab tsim los ntawm ib tug txiv neej hu ua Robert Franklin. Nws tau los nrog lub tswv yim rau kev siv lub phaj capacitor txhawm rau txheeb xyuas qhov ntom ntawm cov khoom xws li phab ntsa hauv 1977. Tom qab ntawd nws tau mus txog ntau lub tuam txhab kho vajtse sim muag nws lub tswv yim nrhiav tshiab tshiab rau lawv.
Thaum twg yog tus nrhiav pom thawj zaug?
Thawj cov khoom siv hluav taws xob nrhiav tau muaj nyob rau hauv 1977 los ntawm lub tuam txhab Zircon. Nyob rau hauv tag nrho pawg, muaj ntau yam subtypes, tab sis feem ntau, tag nrho cov cuab yeej no ua hauj lwm los ntawm ib tug internal capacitor uas tsim ib tug sib nqus hluav taws xob teb uas sau npe kev hloov nyob rau hauv ceev nyob rau hauv lub phab ntsa.
Vim li cas cov neeg nrhiav nrhiav tsis tau ua haujlwm?
Ntau cov hlau nplaum-hom stud finders tsis ua hauj lwm zoo vim lawv teb rau qhov nrhiav cov fasteners (screws) siv los ruaj ntseg drywall. Cov no tuaj yeem nrhiav tau nyuaj heev.
Cov kws tshaj lij puas siv cov neeg nrhiav pom?
Lawv tsis tuaj yeem kuaj pom qhov tseeb, yog li muaj qee qhov kev kwv yees thaum koj nrhiav qhov chaw tiag. Electronic stud finders nquag txheeb xyuas qhov sib txawv ntawm phab ntsa kom pom cov studs. … Cov cuab yeej zoo li radar no feem ntau tsuas yog siv los ntawm cov kws tshaj lij los "pom" dab tsi tom qab phab ntsa dhau ntawm cov studs xwb.
Lub hom phiaj ntawm tus nrhiav nrhiav yog dab tsi?
A stud finder (kuj stud detector los yog stud sensor) yog ib tug handheld device siv nrog cov tsev ntoo los nrhiav framing studs nyob tom qab lubqhov kawg phab ntsa, feem ntau yog phab ntsa ntub dej. Thaum muaj ntau qhov sib txawv ntawm cov nrhiav pom muaj, feem ntau poob rau hauv ob pawg tseem ceeb: cov khoom siv hlau nplaum thiab cov khoom siv hluav taws xob.
Pom zoo:
Los ntawm cov khoom tsim thaum lub sij hawm tsim cov bakelite yog?
Nyob rau hauv rooj plaub ntawm bakelite phenol thiab formaldehyde condense los tsim cov monomer muab H2O raws li cov khoom lag luam. Bakelite tseem hu ua co-polymer. Cov tshuaj tiv thaiv: Phenol reacts nrog formaldehyde los tsim o-Hydroxy methyl phenol.
Thaum twg hlau nrhiav tau tsim?
Gustave Trouvé, tus kws tshaj lij Fab Kis Fab Kis, tau tsim thawj lub tshuab kuaj hlau hauv 1874. Nws tsim ib lub cuab yeej tuav tes txhawm rau nrhiav thiab cais cov mos txwv thiab lwm yam khoom siv hlau los ntawm tib neeg cov neeg mob. Thaum twg yog thawj lub tshuab kuaj hlau muag?
Thaum twg tau txais kev pom zoo nrhiav tau?
In 2009, peb tus tsim thiab CEO Steve Marshall tau txheeb xyuas lub sijhawm hauv kev lag luam pov hwm lub neej thiab Reassured tau tsim. Peb pab tsev neeg tiv thaiv qhov tseem ceeb tshaj plaws rau lawv; Peb Lub Hom Phiaj rau 2020 yog los tiv thaiv ntau dua 200,000 tsev neeg hauv tebchaws Askiv.
Thaum twg cov Islands tuaj galapagos nrhiav tau?
In 1535, Cov Islands tuaj tau raug tshawb pom los ntawm Fray Tomás de Berlanga (tus npisov ntawm Panama thaum lub sijhawm). Nws raug txib kom caij nkoj mus rau Peru los ntawm Charles V los qhia txog kev ua ub no nyob rau ntawd. Nws tau caij nkoj los ntawm Panama rau 23 Lub Ob Hlis 1535.
Puas nrhiav tau lossis nrhiav tau?
Yog li, koj yuav tsum tau siv "could find". Lub modal verb, tau yog twb nyob rau hauv nws paste-form: ua. Yog li koj tsis tas yuav hloov pauv los nrhiav. Yuav nrhiav tau lossis nrhiav tau? "Ntaus" yog sib npaug. "
