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they can advise those who own small pubs or restaurants as to whether it would be better for them to have earth leakage circuit breakers rather than fuse boxes , as circuit breakers are waterproof
gallant roi cyngor i'r rheini sydd biau tafarndai neu fwytai bach a fyddai'n well iddynt gael torwyr cylchedau gollyngiad daear yn hytrach na blychau ffiwsys , gan fod torwyr cylchedau yn dal dwr