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confused grammar
edit" which started operation until 1940. " -- Should this read ' in 1948' or 'which operated until'?Kdammers (talk) 04:19, 16 September 2020 (UTC)
US
editThe article says only one was installed in the US and then says another one was used in the US. this is confusing. Kdammers (talk) 04:20, 16 September 2020 (UTC)