塔吊
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一(yī )种(zhǒng )塔(tǎ )形(xíng )起(qǐ )重(zhòng )机(jī )。机(jī )身(shēn )很(hěn )高(gāo ),由(yóu )型(xíng )钢(gāng )或(huò )钢(gāng )管(guǎn )製(zhì )成(chéng ),可(kě )以(yǐ )在(zài )轨(guǐ )道(dào )上(shàng )移(yí )动(dòng ),起(qǐ )重(zhòng )量(liàng )较(jiào )大(dà )。主(zhǔ )要(yào )用(yòng )于(yú )建(jiàn )筑(zhù )工(gōng )程(chéng )。
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