Evacuated Tube Transport, or ETT, works like this: Pressurised passenger capsules hurtle through maglev tracks enclosed in parallel tubes without any resistance at a speed of 4,000 kmph.
His remarks came on a day when Chief Minister Charanjit Singh Channi announced slashing of the power tariff by Rs 3 per unit for the domestic sector and increasing the dearness allowance for government employees.
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