Koyilo yachitsulo, yomwe imadziwikanso kuti coiled steel.Chitsulocho ndi choponderezedwa ndi kutentha ndi kuzizira mu mipukutu.Pofuna kuwongolera kusungirako ndi zoyendetsa, ndikuthandizira kukonza kosiyanasiyana (mwachitsanzo, kukonza mu mbale zachitsulo, malamba achitsulo, etc.) Ma coil okhala ndi mawonekedwe, kapena mbale zachitsulo, zimatchedwanso mbale zachitsulo zomwe zimakhala ndi zitsulo zokhala ndi rhombuses kapena nthiti. pamwamba.Chifukwa cha nthiti pamwamba pake, mbale yachitsulo yokhala ndi zitsulo imakhala ndi anti-skid effect, ndipo ingagwiritsidwe ntchito ngati pansi, fakitale escalator, ntchito chimango chopondapo, sitima yapamadzi, pansi pamagalimoto, ndi zina zotero. makulidwe oyambira (osawerengera makulidwe a nthiti), ndipo pali 10 mawonekedwe a 2.5-8 mm.No. 1-3 amagwiritsidwa ntchito pa mbale yachitsulo ya checkered.