QTZ50 自升式
■ 超長吊臂（48/50米），覆蓋面大。
■ 標準節(jié)截面大、剛性好、吊重時整機穩(wěn)定、擺動小。
■ 標準節(jié)主肢材料型號大。
■ 電器系統(tǒng)采用國內(nèi)優(yōu)質(zhì)或進口元件，性能穩(wěn)定可靠。
■ 標準節(jié)、拉桿、上下轉(zhuǎn)臺等主要部件（位）全部采用CO2氣體保護焊，熔深大，變形小。
■ 回轉(zhuǎn)機構(gòu)采用雙速電機或繞線電機，啟動平穩(wěn)可靠、無沖擊。
■ 起升機構(gòu)調(diào)速性能好，起升、下降無沖擊、平穩(wěn)。
QTZ50 self-ascending tower crane
■ The ultra long arm（48/50m），the coverage area is big.
■ The standard segment section is wide，rigidity is good，complete machine is stable when craning，swings slightly.
■ The standard segment principal branch model is big.
■ The electrical system uses domestic high quality or importing parts.performance is stable and reliable.
■ The standard segment，drawbar，from top to bottom turntable.ａnd other major components，used in all CO2 gas-shielded welding，penetration depth deep，small deformation.
■ Slewing mechanism adopt two-speed motor or winding motor，starts smooth and reliable，no impact.
■ Hoisting mechanism with good performance of speeding，lifting and declining no impact and smooth.
