For the diameters ratios, the stanchions pipe to ball is approx 0.6, top rail to ball is approx 0.5, mid rail to ball is approx 0.4.

球接栏杆的立柱管直径与球直径之比约为0.6；扶手管直径与球直径之比约为0.5；横杆管直径与球直径之比约为0.4。

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Personnel working on a scaffold platform with full handrail, mid rail, toe boards and gated access are not required to tie off when working inside the platform area.

在扶手、间隔档、板和进出门齐全的脚手架平台上工作的人员，如果在平台区域内部工作，不需要系牢自己。

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"High-speed rail has an important role to play in the United States, particularly for the mid-range distances of 100 to 500 miles," (160 to 800 kilometers) Holguín-Veras says.

“高速铁路将在美国扮演重要的角色，特别是在160km~800km这个中等距离内，”Holguín-Vera声称。

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By the mid-1990s, America's rail industry was back on its feet.

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John Baker, from Network Rail, said it could be mid-week before services improved.

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No one dares estimate the tab for commuter subsidies--or the cost of maintaining a rail bureaucracy, known as the Mid-Region Council of Governments.

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