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Ukwakhiwa kwesakhiwo sensimbi esenziwe ngokwezifiso
1) Insimbi Eyinhloko: Q345, Q235, Q345B, Q235B njll.
inqolobane yesakhiwo sensimbi|indlu yokugcina impahla eyandulelayo|indawo yokugcina izinto yensimbi
2) Ikholomu & I-Beam: Isigaba se-H esishiselwe noma esishisayo