1·To prefabricate box-girder is important in concrete cable-stayed bridge construction, it affects directly the main bridge construction of assembly progress and packing accuracy.
箱梁的预制是钢筋混凝土斜拉桥施工中的重要环节，它直接影响到主桥施工的吊装进度和拼装精度。
2·The scene each kind of inspection well lap and the blind ditch lap in prefabricate in the field to prefabricate, truck transportation, crane loading and unloading, artificial auxiliary.
现场各类检查井盖板及暗沟盖板在预制场内预制，载重汽车运输、吊车装卸，人工辅助。
3·To investigate a new type of low stress precision cropping system, it is necessary to obtain the feasibility that the heat stress was used to prefabricate the ideal crack of V-shaped notch tip.
针对研究新型低应力精密下料系统时，需要获得热应力预制V型槽尖端理想裂纹方法的有效性问题。
4·This paper analyzes causation of slot opening in prefabricate slab and puts forward measure to prevent slotopenmg.
本文分析了顸制楼板顺板缝产生裂缝的原因，并提出了相应的防治措施。