https://youtu.be/QDgAuVK1Br0
PS
It was in the early 1960s at the Colombo Medical Faculty the I heard that ' A tom cat was the only ball-bearing type of rat trap, available in the market'.
PS
It was in the early 1960s at the Colombo Medical Faculty the I heard that ' A tom cat was the only ball-bearing type of rat trap, available in the market'.
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