求翻译：涵洞的盖板集中在预制厂预制，待砼强度达到设计强度的90％以上时，集中用炮车运至现场并集中用大吨位的吊车及时对涵洞的盖板进行安装。安装过程中保证盖板的线性和间距符合设计及规范要求，且在对盖板涵填土前必须保证安装的盖板间密封良好，盖板与墙身间用小石子砼填塞并用沥青麻絮填塞保证盖板和墙身间的密水性。是什么意思？

Culvert precast plants concentrated in the pre-cover, to meet the design strength of concrete strength to be more than 90%, the concentration delivered to the scene with the gun carriage and concentrated with large-tonnage cranes in time to install the cover on the culvert. Cover the installation pr

culvert plate focused on the precast factory prefabricated, to be on behalf of design strength intensity reaches more than 90 per cent, are concentrated in when artillery trucks to the scene and focus on the cable car on a timely basis with a tonnage of box culverts cover plate for the installation.

The culvert lap concentrates in the prefabricated factory prefabrication, waits tong the intensity to achieve when design intensity above 90%, concentrates and concentrates with the artillery vehicle transport to the scene with the great tonnage crane promptly carries on the installment to the culve

Culvert cover focus on precasting factory prefabricated, when concrete strength of design strength of 90% or more, focus their Gun Carriage to the scene and concentrated on culvert with large-tonnage crane in time cover to install. Guarantee cover linear and space during the installation complies wi

Culvert precast plants concentrated in the pre-cover, to meet the design strength of concrete strength to be more than 90%, the concentration delivered to the scene with the gun carriage and concentrated with large-tonnage cranes in time to install the cover on the culvert. Cover the installation pr