Matsakaicin da ke tsakanin ganye da ƙofar ƙofar wuta na karfe ba zai zama ƙasa da 10mm ba, kuma rata a bangarorin biyu tsakanin ganye da firam ɗin ƙofar kada ta wuce 4mm. Bayan an shigar da ƙofar wuta da rufewa, bai kamata tazarar ta kasance mai girma ba, in ba haka ba aikin ƙofar wuta zai yi wuya a tabbatar da shi, kuma zai yi wuya a nuna aikinta na danne yaduwar wuta da hayaki a ƙarƙashin wuta. yanayi.

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