Type 091 and 092 nuclear submarines. Photo: SMP Type 091 and 092 nuclear submarines. Photo: SMP
Type 091 and 092 nuclear submarines. Photo: SMP

China's pirate patrol submarine is too noisy, say naval experts

Type 091 and 092 nuclear submarines. Photo: SMP Type 091 and 092 nuclear submarines. Photo: SMP
Type 091 and 092 nuclear submarines. Photo: SMP
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