A na ua tseba ka sekhutlo?

Hangata, re ka reka mefuta e 3 ea sehahi
30degree/45degree/60degree angle' marakeng.
Thepa e thehiloeng ho vinyl (lisebelisoa tse thata) sebelisa seha sekhutlo sa 60degree,
Lisebelisoa tse thehiloeng ho PU (lisebelisoa tse bonolo) li sebelisa sehahi sa li-angle tse 30. o