Nā niho maina lānahu

Hoʻohana nui ʻia ka mea ʻoki mea kaumaha ma ka stratum pōhaku paʻakikī a i ʻole strata paʻakikī e loaʻa ana ka ʻiliʻili one me ke anawaena nui, ka ʻiliʻili a me ka pālolo one. ʻO kāna kuleana e wehe i ka muck e pale ai i ka Roller Disc Cutter a me ka ʻoki mua ʻana i ke kino Bit.

ʻO Scraper Bit kahi ʻano o nā Cutter Bits i hoʻonohonoho ʻia ma ka lihi nui loa o Cutter Head. Hoʻohana ʻia ia e ʻoki i ka lepo palupalu a puni ka Cutter Head e mālama i ke anawaena o ka ʻeli like ʻana. Hiki iā ia ke wehe i ka slag pōhaku i haki ʻia e Disc Cutter a me Pre-cutting Bit i ka stratum pōhaku paʻakikī a me nā strata paʻakikī.

ʻO ka mea ʻoki maʻamau he mea hana lepo palupalu ia, hoʻohana mau ʻia ia no nā kūlana strata leʻa e like me ka silt, silt maikaʻi, pālolo, one waena, one-grained-grained and gravelly sand layer. Hoʻokomo ʻia nā mea ʻokiʻoki ma nā puka hoʻomaka o Cutter Head a hoʻohana ʻia no ka ʻeli ʻana i ka hapa nui o nā ʻāpana. ʻOiai ke neʻe nei ʻo Shield Machine, ke kaʻapuni nei ka Cutter Bit me ka Cutter Head. Hoʻoneʻe ka neʻe ʻana i ka ʻoki a me ka mea hana i loko o ka lepo a hana i ka pūʻulu hoʻopaʻa axial (ʻaoʻao i mua i ke alo) a me ka ikaika ʻoki radial (kuhikuhi pololei o ka Cutter Wheel) e hana ai i ka ʻeli.
Hoʻohana nui ʻia ka mea ʻoki mea kaumaha ma ka stratum pōhaku paʻakikī a i ʻole strata paʻakikī e loaʻa ana ka ʻiliʻili one me ke anawaena nui, ka ʻiliʻili a me ka pālolo one. ʻO kāna kuleana e wehe i ka muck e pale ai i ka Roller Disc Cutter a me ka ʻoki mua ʻana i ke kino Bit.

ʻO ka mea ʻoki maʻamau he mea hana lepo palupalu ia, hoʻohana mau ʻia ia no nā kūlana strata leʻa e like me ka silt, silt maikaʻi, pālolo, one waena, one-grained-grained and gravelly sand layer. Hoʻokomo ʻia nā mea ʻokiʻoki ma nā puka hoʻomaka o Cutter Head a hoʻohana ʻia no ka ʻeli ʻana i ka hapa nui o nā ʻāpana. ʻOiai ke neʻe nei ʻo Shield Machine, ke kaʻapuni nei ka Cutter Bit me ka Cutter Head. Hoʻoneʻe ka neʻe ʻana i ka ʻoki a me ka mea hana i loko o ka lepo a hana i ka pūʻulu hoʻopaʻa axial (ʻaoʻao i mua i ke alo) a me ka ikaika ʻoki radial (kuhikuhi pololei o ka Cutter Wheel) e hana ai i ka ʻeli.

	ʻohiʻohi lānahu
	ʻAno Huahana	U82 U84 U85 U92 U94 U95 S100 S120 S135
	Nā noi noi	mīkini kūkulu hale
	Māhele	Nā ʻāpana hoʻouku