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As the world of shipping evolved with advancements in technology, the role of cannon bollards began to transition. The introduction of steam-powered ships and later, container vessels, brought about changes in mooring practices. Despite this shift, cannon bollards remained a resilient part of port architecture, embodying a romanticized view of the maritime past. More importantly, they recognized the enduring connection between the sea and the cities that thrive along its shores.

Furthermore, the round design is optimal for distribution of stress. When vehicles pass over a manhole cover, the weight is typically distributed evenly across the surface due to its symmetrical shape. This characteristic reduces the likelihood of cracking or breaking under heavy loads, leading to increased durability. With the urban environment constantly evolving, where heavy vehicles and machinery are commonplace, the robustness of round covers becomes even more significant.

The primary purpose of steel gully grids is to manage stormwater effectively. Inefficient drainage can lead to flooding and water pooling on roads, parking lots, and pedestrian walkways. A well-designed drainage system with high-quality gully grids mitigates these risks, enhancing safety for both vehicles and pedestrians. Furthermore, by preventing debris and pollutants from entering the drainage, steel gully grids contribute to maintaining water quality in nearby natural bodies.