leej twg invented lub hlau saw
Cov hlau pom, tshwj xeeb tshaj yog nyob rau hauv nws cov niaj hnub daim ntawv raws li lub pob zeb diamond hlau pom, tau hloov zuj zus raws sij hawm nrog kev koom tes los ntawm ntau yam inventors thiab kev loj hlob. Lub tswv yim ntawm kev siv cov xaim rau kev txiav cov hom phiaj hnub rov qab mus rau lub sijhawm qub, nrog rau kev siv thaum ntxov pom nyob rau hauv Egypt thaum ub, qhov twg cov xov hlau embedded nrog abrasive hais tau siv rau txiav pob zeb.
Txawm li cas los xij, ib qho kev loj hlob tseem ceeb hauv kev siv tshuab xaim hluav taws xob tuaj nyob rau xyoo pua 19th. Xyoo 1894, tus kws phais neeg Italian thiab kws kho menyuam yaus Leonardo Gigli tau tsim lub Gigli twisted hlau pom. Cov cuab yeej no tau pib tsim los rau kev siv kho mob, xws li qhib lub pob txha taub hau, tab sis nws cov qauv tsim thiab kev ua haujlwm tau tso lub hauv paus rau kev tsim cov hlau saws hauv lwm cov kev lag luam.
Niaj hnub nimno pob zeb diamond hlau pom, raws li peb paub niaj hnub no, pib zoo nyob rau hauv nruab nrab -20th caug xyoo. Nrog lub advent ntawm hluavtaws pob zeb diamond technology nyob rau hauv 1950s, cov kws tshawb fawb pib sim nrog embedding pob zeb diamond hais rau hauv hlau saws. Qhov kev tsim kho tshiab no tau txhim kho qhov kev ua tau zoo thiab ua haujlwm ntev ntawm cov saws, ua rau lawv siv dav hauv kev tsim kho, tsuas, thiab kev lag luam zeb.
