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1
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mainline
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United States
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In US culture, 'mainline' refers to the main road or route in a transportation network.
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6
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2
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mainline
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UK
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In the UK, 'mainline' refers to primary railway routes connecting major cities and towns.
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4
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3
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mainline
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Western countries
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In the US and some Western countries, 'mainline' refers to the principal transportation route.
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2
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4
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mainline
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North America
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In North America, 'mainline' refers to the primary railroad or highway route connecting major cities.
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1
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5
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mainline
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Philippines
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In the Philippines and South Korea, 'mainline' refers to the primary water or sewage pipe in a household or building.
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1
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