1.Ithangi lebitumen
Iqukethe ithangi elingaphakathi, izinto zokufaka ezishisayo, izindlu, ipuleti lesihlukanisi, igumbi elivuthayo, amapayipi etiyela ethangini, amapayipi kawoyela ashisayo, isilinda somoya, imbobo yokugcwalisa uwoyela, ivolumu, nepuleti lokuhlobisa, njll. Ithangi liyisilinda esiyielliptic, elishiselwe izingqimba ezimbili ze-steel plate, futhi phakathi kwazo uboya be-rock bugcwaliswa ukuze kufakwe ukushisa okushisayo, okunogqinsi okungama-50~100mm. Ithangi limbozwe ngepuleti lensimbi engagqwali. Umkhombe wokucwila ubekwe phansi ethangini ukuze kube lula ukuchithwa kwetiyela ngokuphelele. Izisekelo ezi-5 ezifakwayo ezansi ethangini zishiselwa ngohlaka oluncane njengeyunithi eyodwa, bese ithangi limiswa ku-chassis. Ungqimba lwangaphandle lwegumbi lomlilo luyigumbi lokushisa uwoyela oshisayo, futhi umugqa wamapayipi kawoyela oshisayo afakwe ngaphansi. Izinga letiyela ngaphakathi kwethangi liboniswa ngevolumu.
