Hand-held flashlights tau qhia kwv yees 1900 nrog rau cov roj teeb ntawm tes qhuav thiab cov roj teeb incandescent. Cov qij thaum ntxov feem ntau tsis yooj yim kom muaj sia nyob qhov nrawm ntawm rab phom rov qab.
Puas yog lub teeb tsom teeb raug cai?
Txawm tias koj tsis nyob hauv tub rog lossis tub ceev xwm, thiab tsis muaj rab phom los yog rab phom, lub teeb siv hluav taws xob tuaj yeem yog koj thawj kab kev tiv thaiv. Lawv raug cai zoo kawg nkaus thiab tuaj yeem nqa mus rau hauv qhov chaw xws li ua yeeb yam, chaw ua haujlwm, dav hlau, thiab lwm qhov chaw uas tsis pub phom.
Puas yog lub teeb tsom teeb yog riam phom?
Raws li tactical flashlights tsis suav tias yog riam phom piv rau lwm yam cuab yeej tiv thaiv tus kheej xws li tshuaj kua txob, lawv tuaj yeem nqa mus rau huab cua thauj, txhais tau tias tsis muaj teeb meem nrog cov khoom no yog cov cuab yeej nqa txhua hnub rau cov neeg taug kev.
Vim li cas lub teeb liab tactical?
Vim li cas lub teeb liab tactical? Feem ntau qhov no yog suav tias yog ib qho 'tactical' yam vim nws feem ntau siv los ntawm cov tub rog ua ib txoj hauv kev ua haujlwm hauv qhov tsaus ntuj zoo dua, thiab tsis tshua pom los ntawm cov yeeb ncuab. Nws yog feem ntau khaws cia hmo pom kev. Nws yuav siv lub qhov muag ib nrab teev lossis ntau dua kom tsaus ntuj kom haum.
Thaum twg tub ceev xwm pib siv lub teeb nyem?
Zoo 1970s-Early 1980s. Thawj lub teeb nyem rechargeable tau qhia rau cov neeg ua haujlwm xwm txheej ceev. Muaj ib lub teeb uas recharged nws tus kheejkiv puag ncig thiab muab cov tub ceev xwm thiab cov neeg tua hluav taws muaj peev xwm pab cov pej xeem tsis ntshai lawv lub teeb nyem muab tawm.
