Hoʻohui nā pono hydraulic i nā laina aila e hoʻoikaika ai i nā excavators, tractors, presses, a me nā forklifts. Ke hele nei kēia ʻatikala ma nā noi honua maoli ma waena o nā ʻoihana ʻehā - ke kūkulu ʻana a me ka mining, ka mahiʻai, ka hana ʻenehana, a me ka mālama ʻana i nā mea waiwai - me nā kiʻi kahua e hōʻike ana i ke ala o nā mea hoʻololi i nā poloka valve maoli, nā ʻāpana pauma, a me nā ʻeke mana.
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