桁架塔

For the very beginning, the concept of lattice truss only used in the construction of bridge or communicative tower, and now it has been used in all kinds of buildings and modern technology has resolved many complex technical problems.

金属空间桁架经过二百馀年的发展，由初步的结构概念到现今，使用的目的及范围由早期的建造桥梁和通讯塔，到目前则广被运用于体育场、车站等多元的场所。

As the housing construction component of suspension bridge, and when the tower crane tower, the pillar of the beam, the truss are bent stem working stress.

工程构件诸如房屋的柱、悬索桥、斜拉桥的塔、塔时起重机的立柱、桁架梁的上弦杆等工作时均处于受压状态。

In regard to cross the river bridge is now formed pontoon, mechanized bridge / trestle, mechanization railway platform, fabricated truss bridge, building bridges and a motorboat, engineering, floating boxes, fabricated steel products such as road series; in the Special Purpose Vehicle and engineering machinery and mechanization of the main pontoon bridge and set up a dedicated delivery vehicles, loading and unloading trucks and other products from the series; in the steel works has developed a road / rail bridge steel structure, metallurgical equipment, various power transmission towers and microwave towers, steel columns, steel poles and other products.

在渡河桥梁方面，现已形成舟桥、机械化桥/栈桥、机械化铁路站台、装配式桁架桥、架桥汽艇、工程浮箱、装配式公路钢桥等产品系列；在专用汽车和工程机械方面主要有舟桥和机械化桥运载及架设专用车、自装卸车等产品系列；在钢结构工程方面开发了公路/铁路桥梁钢结构、冶金设备、各种输变电塔和微波塔、钢柱、钢质电线杆等产品。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。