It means that SMRT intends to use the older trains with new motors for the time being.
Why SMRT doesn't abolish the older trains by installing new ones?
There aren't enough trains for SMRT to alternate older trains?
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It means that SMRT intends to use the older trains with new motors for the time being.
Why SMRT doesn't abolish the older trains by installing new ones?
There aren't enough trains for SMRT to alternate older trains?