I-1. Impembelelo ye-tare yokunyathela
Ukunzulu kwendlela, kokukhona inqaku le-elastic yebhloko ekunxibelelaneni nomhlaba, kwaye ukuchasana nokurhangqa kwenziwe yilahleko yediliya i-Hysteristic Hysteris Hosteris Holsteris kuya kunyuka. Iipateni ezinzulu azikufanelekeli kubushushu betshisi, ukuze iqondo lobushushu liphuma ngokukhawuleza, kwaye iingcambu zeepateni kulula ukuzikrazula kwaye ziwe ngenxa yokohlwaywa kakhulu. Ipateni engagungqiyo ayichaphazeli kuphela ukugcinwa kwamanzi kunye nomthamo wentshukumo, kwaye ixhonywe ekwenzeni i-sking eyenzakalisayo, kodwa iyenza i-ciressing ye-tiires "kodwa iyenza ukuba le nto ithathelwe ingqalelo ngaphambili.
2. Ipateni inzulu kakhulu okanye ilula kakhulu.
Ke ngoko, inzulu kakhulu okanye engalunganga kakhulu le pateni ayilunganga. Umthetho ngenjongo kukuba le patheni iya kuba mncinci kwaye incinci ukuba isetyenziswe. Ukuqinisekisa ukusebenza kwephethini, amazwe akwilizwe elijikeleze imigaqo ecacileyo kwipateni yetyhefu yokunxiba imida. Kwaye ukufa kuqhutywa itayara kunciphisa uphawu lwesilumkiso "" okanye (kwaye) "Twi" ngesiNgesi kwitrayi elinganayo. Xa umhlaba we-convex unxibe umgama wepatheni ukuba malunga ne-1.6mm (1\/16 i-intshi) ukuya emazantsi epateni ye-roove, ngoko umtya owongamileyo wokukhanya okutyhilekileyo.