Sim sapaklaryny salmagyň standarty näme we çig mal üçin talaplar nämeler?
Simli sapak halkara standartyny girizýär DIN8140, MS21209, N913 / N926A / N926B / N926C (GE ýörite), 1301-SCT 149+ Uen (Ericsson ýörite), BS 7752 (Angliýa), MO-44421 (Toshiba Japanaponiýa) an .. .
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