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17
2021-12
Nā mea e pili ana i ka pale ʻana o ka uea keleawe
Mea keleawe. ʻOi aku ka maʻemaʻe o ka uea keleawe maʻamau ma mua o 99%, ʻoiai ʻoi aku ka kiʻekiʻe inā hana ʻia i ke keleawe oxygen-free. He mea ʻino ka haumia i ka palekana o ka ukana nui o kēia manawa, ʻoi aku ka haumia kiʻekiʻe, ka resistivity kiʻekiʻe, ʻo ia hoʻi, ʻoi aku ka maikaʻi o ka maʻemaʻe kiʻekiʻe.
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20
2021-12
Mea hoʻokele keleawe
Ua hoʻohana ʻia ke keleawe i ka uwila uila mai ka wā i hana ʻia ai ka electromagnet a me ka telegraph i nā makahiki 1820. ʻO ka mea i hana ʻia o ke kelepona i ka makahiki 1876, ua hoʻokumu hou ʻia ke koi no ka uea keleawe ma ke ʻano he alakaʻi uila.
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20
2021-12
Nā hopena o ka hōʻemi ʻauhau ʻo Kina i ka ʻoihana keleawe
E like me ka mea i hōʻike ʻia ma ka 13th National People's Congress e ke kuhina nui ʻo Li Keqiang i ka lā 5 o Malaki, e hoʻokō ʻo Kina i ke kulekele hōʻemi ʻauhau i kēia makahiki, e ʻoki i ka Value-Added-Tax (VAT) no nā ʻoihana hana i ka 3 pakeneka.
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20
2021-12
ʻO kekahi mau hana hana mākou e hoʻomākaukau ai i nā mea keleawe
Ma kēia ʻatikala, makemake mākou e hoʻolauna i kekahi mau hana hana ʻo Vekon Copper e hoʻohana ana me nā kiʻi animated, hiki i kēia mau ʻenehana ke hoʻokō i nā koi o nā mea keleawe semi-finished.
