A rack railway also rack-and-pinion railway, cog railway, or cogwheel railway is a steep grade railway with a toothed rack rail, usually between the running rails. The trains are fitted with one or more cog wheels or pinions that mesh with this rack rail. This allows the trains to operate on steep grades above 10%, which is the maximum for friction-based rail. Most rack railways are mountain railways, although a few are transit railways or tramways built to overcome a steep gradient in an urban environment.
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 480 x 299 | JPG | 13 | |
標準授權 | S | 800 x 498 | JPG | 15 | |
標準授權 | M | 2194 x 1367 | JPG | 18 | |
標準授權 | L | 2832 x 1764 | JPG | 20 | |
標準授權 | XL | 3583 x 2232 | JPG | 22 | |
標準授權 | MAX | 6000 x 3738 | JPG | 23 | |
標準授權 | TIFF | 8485 x 5286 | TIF | 39 | |
進階授權 | WEL | 6000 x 3738 | JPG | 88 | |
進階授權 | PEL | 6000 x 3738 | JPG | 88 | |
進階授權 | UEL | 6000 x 3738 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
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標準授權 | 480 x 299 px | JPG | 13 點 |
標準授權 | 800 x 498 px | JPG | 15 點 |
標準授權 | 2194 x 1367 px | JPG | 18 點 |
標準授權 | 2832 x 1764 px | JPG | 20 點 |
標準授權 | 3583 x 2232 px | JPG | 22 點 |
標準授權 | 6000 x 3738 px | JPG | 23 點 |
標準授權 | 8485 x 5286 px | TIF | 39 點 |
進階授權 | 6000 x 3738 px | JPG | 88 點 |
進階授權 | 6000 x 3738 px | JPG | 88 點 |
進階授權 | 6000 x 3738 px | JPG | 88 點 |