Ua like anei nā ʻaoʻao ʻelua o nā Granite Straightedges?

ʻO nā granite straightedges ʻoihana he mau mea hana ana pololei i hana ʻia mai ka granite kūlohelohe kiʻekiʻe a kanu hohonu ʻia. Ma o ka ʻoki ʻana i ka mīkini a me nā kaʻina hana hoʻopau lima me ka wili ʻana, ka poli ʻana, a me ka lihi, ua hana ʻia kēia mau granite straightedges no ka nānā ʻana i ka pololei a me ka palahalaha o nā ʻāpana hana, a no ke kau ʻana i nā lako. He mea nui lākou no ke ana ʻana i ka palahalaha o nā papa mīkini mīkini, nā alakaʻi, a me nā ʻili kikoʻī ʻē aʻe. ʻO kahi hiʻohiʻona koʻikoʻi o kēia mau mea hana ʻo ia ka parallelism like a me ka perpendicularity o ko lākou mau alo ana. Ke alakaʻi nei kēia i kahi nīnau maʻamau: Ua like anei nā alo ʻelua o kahi granite straightedge maʻamau?

ʻO nā waiwai kino kūikawā o ka granite e hāʻawi i kēia mau pono straightedges i kūlike ʻole me nā mea hana i hana ʻia mai nā mea ʻē aʻe:

1. Pale i ka ʻAi ʻAna a me ka Pōpopo: Ma ke ʻano he mea pōhaku ʻaʻole metala, ʻaʻole loa ka granite i nā waikawa, alkalis, a me ka makū. ʻAʻole loa ia e pōpopo, e hōʻoiaʻiʻo ana e paʻa mau ana kona pololei i ka hala ʻana o ka manawa.
2. Paʻakikī Kiʻekiʻe a me ke Kūpaʻa: Pono ka granite i hoʻohana ʻia no nā mea hana pololei e loaʻa ka paʻakikī kahakai ma luna o 70. ʻO kēia pōhaku paʻa a like ke ʻano, he liʻiliʻi loa kona coefficient o ka hoʻonui ʻana i ka wela a ua hala i ka wā ʻelemakule kūlohelohe, e hopena ana i kahi ʻano stress-free, ʻaʻole e deforming. ʻAe kēia i nā granite straightedges e hoʻokō a mālama i ka pololei kiʻekiʻe ma mua o ko lākou mau hoa hao i hoʻolei ʻia.
3. Hana ʻAʻole Magnetic a Laumania: ʻOiai ʻaʻole ia he metala, ʻaʻohe magnetic maoli ka granite. Hāʻawi ia i ka neʻe laumania a ʻaʻohe friction i ka wā o ka nānā ʻana me ka ʻole o ka manaʻo pipili, ʻaʻole i hoʻopilikia ʻia e ka makū, a hāʻawi i ka palahalaha kūikawā.

Ma muli o kēia mau pono koʻikoʻi, he mea nui e hoʻomaopopo i nā ʻaoʻao pololei o kahi granite straightedge maʻamau. Hoʻopili ʻia ka pololei mua i nā ʻaoʻao hana lōʻihi a haiki ʻelua, e hōʻoiaʻiʻo ana ua like lākou a kū pololei kekahi i kekahi. ʻO nā ʻaoʻao hopena liʻiliʻi ʻelua ua wili pololei ʻia, akā ua hoʻopau ʻia lākou e kū pololei i nā ʻaoʻao ana lōʻihi e pili ana, ʻaʻole like kekahi i kekahi.

Hana ʻia nā ʻaoʻao pololei maʻamau me ke kūlike ma waena o nā ʻaoʻao pili āpau. Inā koi kāu noi i nā ʻaoʻao liʻiliʻi ʻelua e kūlike pono kekahi i kekahi, he koi kūikawā kēia a pono e kuhikuhi ʻia ma ke ʻano he kauoha maʻamau.