Doha, Qatar-The large number of civilians fleeing Afghanistan has threatened that the air base here is overwhelmed. Many evacuees are crowded in the sultry hangar without enough toilets and showers...
Recently, the State Council issued the 2014-2015 energy conservation and emission reduction and low-carbon development action plan. In view of the severe situation of energy consumption and pollut...
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Derusting quality grade of steel structure
Derusting method of grade quality standard
1.Steel surface exposed to metal color sandblasting, shot blasting, pickling
2.It is allowed to keep c...
1、 The drilling is preferred for the hole making of steel structure. When it is proved that the quality, thickness and hole diameter of some materials will not cause brittleness after punching,...