suitjesca klaas antarvaahini

1950 kalude avasaanathilum 1960 kalude thudakkathilum yugoslav naavikasenaykkaayi nirmmicha rund deesal-electric antharvaahinikalude oru vibhagamaayirunnu "suitjesca" klaas. pulayile uljanik kappalsala nirmmicha eee rund bottukalum yugoslaviayil nirmmicha aadya klaas antharvaahinikalaayirunnu.
design.
roopakalppana cheythath yougoslaviayilaanu, soviyatt censorukal (radar sonar) upayogichu. upayogichu aadhunikavalkkaricha sonar upayogichu kappalukalkk oru punarnirmmaanam undaayirunnu.

