launching erection是什么意思

网络释义

1)launching erection,曳进架设法2)segmental launching method,分段曳进法3)towing arch,拖曳弓架4)launching truss,滑曳桁架5)erection method,架设方法6)launching nose,曳进导梁

The erection method of bridge precast beam slab;