Njira yopitilira chubu (yotchedwa MPM) ndi ndondomeko ya mandrel yomwe imatanthawuza kuvala ndime ya capillary yaitali mosalekeza kudzera muzitsulo zotsatizana, kugudubuza ndi kupiringa kumayenderana ndi kukula kwa chitoliro cha mayi. Mbali yake yosiyanitsa ndi mphamvu yayikulu, yogwira ntchito kwambiri, kutalika kwa chitoliro chopanda kanthu ndi khalidwe la mankhwala, kukula kwakukulu; koma ndalama zake zazikulu ndi ukadaulo wokhudzana ndi kuwongolera kodziwikiratu ndizofunika kwambiri.

MPM choyika chamtundu wa mipukutu iwiri, kapangidwe kake kofanana kwambiri ndi mphero wamba. Malinga ndi kayendedwe ka mandrel MPM akhoza kugawidwa mu zonse zoyandama ndi theka choyimitsa mandrel mphero mitundu itatu.

1970s pamaso MPM ntchito zonse zoyandama mandrel ntchito. Kuchokera nkhonya kudutsa capillary pambuyo mandrel mu chitoliro Kugubuduza makina akugubuduza, kugudubuza pamene Kugubuduza kuchokera mphero ndi maziko kukokera kumbuyo kwa odzigudubuza mandrel, pali mipiringidzo pa makina ku Kugubuduza membala mandrel ndi kuchotsedwa, kugubuduza mu sitepe yotsatira, ndi kubwerera ku mandrel mphero phwando pambuyo kuzirala, kulowanso mkombero wotsatira wa ntchito.

1970s France ndi Italy adawonekera mu mandrel theka choyimitsa ndi choyimitsa cha MPM. Kwenikweni, njira ziwirizi zogwirira ntchito pa makina ogubuduza chubu a mandrel, amabwereka ku njira ya mandrel yogwiritsira ntchito makina opukutira atatu.
Theka anapitiriza mandrel njira ntchito, ali m'kati akugubuduza, ndi mandrel kayendedwe liwiro ndi yochepa, khadi chofukizira mandrel ndi clamped kuti zosakwana adagulung'undisa patsogolo liwiro workpiece. Anasungidwa mandrel njira ntchito, kupatula pa kugubuduza, ndi mandrel kayendedwe liwiro ndi yochepa, tayi anamaliza pambuyo anagubuduza, ndi mandrel ndi chofukizira khadi kukokedwa kubwerera kuntchito poyambira.

M'zaka zaposachedwapa, Y-woboola pakati atatu mpukutu MPM yodziwika PQF mphero, anatsatira maganizo-kuchepetsa luso lachiwiri wodzigudubuza kusintha atatu wodzigudubuza, kotero akugubuduza ndondomeko akugubuduza mapindikidwe mikhalidwe ya nkhawa ndi mapindikidwe kugawa, makina, zida zamagetsi katundu katundu kugawa, Kugubuduza khoma makulidwe ndi khoma makulidwe kulolerana ndipo ali ndi awiri mpukutu mphero zosayerekezeka ubwino. khola Kugubuduza ndondomeko yake akhoza bwino chitoliro mtanda gawo gawo, m'dera flange m'munsi kapena mng'alu Lin Wen chodabwitsa m'munda wa mipope woonda-mipanda ndi kugubuduza mkulu aloyi chitoliro chosinthika ndi chuma.