求翻译：由均匀排列的间隔不超过1.5m的立柱和三根杠杆组成,栏杆高度,室内至少为1米,室外到少1.1米。钢格栅、栏杆、扶手、钢梯等均在工厂制作成品，专业人员安装是什么意思？

Arranged by the uniform intervals of not more than 1.5m of the column and three levers composition, railing height, at least 1 meter indoor, outdoor to less 1.1 meters. Steel grating, railing, handrails, ladders are on the factory production of finished products, professional installation

正在翻译，请等待...

Does not surpass 1.5m by the even arrangement gap the column and three release levers is composed, the parapet altitude, in the room is at least 1 meter, the outside to the few 1.1 meters.The steel grill, the parapet, the arm rest, the steel ladder and so on in the factory manufacture end product, t

By evenly arranged intervals of no more than 1.5m composed of columns and three levers, railing heights, in the room is at least 1 m, outdoor to less 1.1 meters. Steel grating, railings, handrails, steel ladder are made in a factory finished product, professional installation

Arranged by the uniform intervals of not more than 1.5m of the column and three levers composition, railing height, at least 1 meter indoor, outdoor to less 1.1 meters. Steel grating, railing, handrails, ladders are on the factory production of finished products, professional installation