Lawang geni baja mung kudu dibukak kanthi tangan, banjur ditutup kanthi otomatis, supaya bisa nggawe lingkungan sing sepi, ora bakal ana swara tabrakan kaya mbukak lawang internal lan eksternal. Lawang baja tahan api bisa dilengkapi jendhela, engsel, kunci, tutup lawang lan bagean nganggo liyane sing dibutuhake, sing nduweni kualitas dhuwur lan gampang dibukak lan ditutup.

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