I-Intrinsically Safe Explosion-proof Mark

Ubungqina bokudubula bukhuselekile ngokwangaphakathi bumele udidi oluthile kwiindlela zokumelana nokudubula, ngokusemthethweni ibizwa ngokuba 'yiKhuseleko Ngaphakathi,’ kwaye ibonakaliswa ngumqondiso “i.”

Olu hlobo luhlelwe ngokwamanqanaba amathathu ahlukeneyo: ia, ib, kunye ic, nganye ibonisa iqondo elahlukileyo lokhuseleko lwangaphakathi.