Granite platform yog precision cuab yeej crafted los ntawm kev tuav cov hniav sib tsoo siv cov khoom siv granite li cov khoom siv raw. Dab tsi ua rau lawv sawv tawm yog lawv lub peev xwm zoo kawg nkaus los tswj cov zog siab txawm tias nyob rau hauv lawv cov mineral muaj pes tsawg leeg thiab tshwj xeeb lub cev muaj zog.
Cov khoom siv ua haujlwm tseem ceeb ntawm granite, plagioclase, nrog me me ntawm cov txiv qaub, biotite, thiab kab magnetite. Qhov kev suav ntuj ntuj no ua cov qauv ruaj khov thiab ruaj khov, tso lub hauv paus rau lub hnab ua haujlwm.
Muaj undegone ntau pua lab xyoo laus, cov khoom lag luam granite, cov khoom siv granite uas muaj kev sib tw thiab muaj kev ruaj khov zoo. Nws linear nthuav tawm cov coefficient yog li 4.6 × 10⁻⁶ / degree, ua rau nws kub ntxhov, kom muaj kev hloov pauv ntawm qhov chaw nrog cua hloov pauv. Cov dej nqus dej yuav tsum yog 0.13%, uas pab tiv thaiv kev hloov pauv ntawm kev nqus dej noo, ntxiv kev tiv thaiv nws qhov tseeb.
Nrog ntug dej hardness (HS) ntawm ntau tshaj 70, lub pob zeb granite siab thiab lub zog. Qhov no tso cai rau nws tiv thaiv cov nra hnyav yam tsis muaj deformation, kom ntseeg tau tias qhov chaw nyob ncaj thiab meej. Tsis zoo li qee cov ntaub ntawv uas tuaj yeem ua txhaum lossis poob lawv cov qauv hauv kev ua kom muaj qhov tseeb txawm tias muaj hnyav hnyav.
Ntxiv rau kev saib xyuas precision nyob rau hauv cov nra hnyav, granite platform muaj lwm yam kom zoo dua. Lawv tsis yog - rowing, tsis- deformable, thiab tsis ntseeg siab nyob rau hauv ntau yam kev ua haujlwm. Cov yam ntxwv no ua rau lawv zoo tagnrho rau kev lag luam ntau thiab kev sim ntsuas kev ua haujlwm, qhov twg yog qhov tseem ceeb tshaj plaws yog qhov tseem ceeb tshaj plaws.
Txawm hais tias nyob rau hauv cov chaw kuaj khoom tsis khoom lossis cov txheej txheem ntsuas hluav taws xob, cov khoom siv hluav taws xob zoo nkauj nrog cov cuab yeej hnyav hauv cov teb uas xav tau qhov tseeb thiab kav ntev.