Lub tshuab ua cov tshuab ua haujlwm tau hais meej tias cov txheej txheem ua tshuab yuav tsum ua tau raws li qee qhov kev txiav txim siab, uas yog hais txog qib ntawm qhov sib xws ntawm cov ntsiab lus geometrical ntawm cov hlau qhov chaw tom qab kev siv tshuab thiab cov txiaj ntsig zoo xav tau los ntawm cov duab kos. Cov theem ntawm inconsistency ntawm lawv yog hu ua ntau lawm thiab ua deviation.
Kev tsim khoom thiab kev ua tiav ntawm cov khoom siv tshuab ua haujlwm suav nrog peb theem: ntawm ib sab, nws yog qhov tseeb ntawm cov kev qhia tshwj xeeb, uas txwv qhov sib txawv ntawm cov kev qhia tshwj xeeb ntawm ob tus qauv ntawm kev tsim khoom thiab kev ua haujlwm kom tsis pub dhau qhov tsim nyog. ; ntawm qhov tod tes, qhov tseeb ntawm cov duab geometric txwv kev tsim khoom thiab kev ua haujlwm. Lub macroeconomic geometry ntawm qhov saum npoo muaj qhov sib txawv, xws li roundness, cylindricity, parallelism, thiab ncaj.
Ntawm qhov tod tes, nws yog qhov tseeb ntawm qhov sib koom ua ke, uas txwv qhov sib txawv ntawm qhov sib txawv ntawm ob tus qauv ntawm lub tshuab ua haujlwm tshuab' s ntau lawm thiab ua cov txheej txheej saum npoo, xws li coaxiality, flatness thiab parallelism. Qhov tseeb ntawm kev tsim khoom thiab kev ua tiav yog qib ntawm qhov tseem ceeb ntawm qhov tseeb specifications, tsos, thiab qhov chaw ntawm qhov chaw ntawm qhov chaw tom qab kev tsim khoom thiab cov ntsiab lus tseem ceeb ntawm qhov zoo tshaj plaws geometry teev nyob rau hauv engineering drawings.
Cov tsis tseem ceeb ntawm cov duab geometric zoo tshaj plaws yog qhov nruab nrab ntawm cov lus qhia tshwj xeeb; lub voj voog, lub tog raj kheej, daim duab dav hlau, spheres thiab kab sib npaug, thiab lwm yam. rau cov duab geometric nto; rau kev sib koom ua ke hauv nruab nrab ntawm qhov chaw, Xa mus rau lub dav hlau sib luag, ntsug, coaxial tso zis, symmetry thiab lwm yam.
Qhov sib txawv ntawm qhov tseem ceeb ntawm daim duab geometrical thiab qhov tseem ceeb ntawm cov duab geometric zoo tshaj plaws yog hu ua qhov kev sib txawv ntawm kev tsim khoom. Kev tsim cov txheej txheem ntau lawm thiab kev ua haujlwm sib txawv yog tag nrho cov lus tshaj lij rau kev tawm tswv yim ntawm cov khoom tseem ceeb ntawm kev tsim khoom thiab kev ua haujlwm saum npoo geometry. Lub precision ntawm ntau lawm thiab ua yog txiav txim siab los ntawm theem kam rau ua. Qhov tsawg dua tus nqi, qhov siab dua qhov tseeb; qhov sib txawv ntawm kev tsim khoom thiab kev ua tiav yog qhia los ntawm tus qauv tus nqi, thiab qhov loj dua tus qauv tus nqi, qhov ntau dua qhov sib txawv.
