Cov ciaj sia siv cov khoom siv hluav taws xob, cov khoom ua si, cov khoom ua si, cov khoom ua si (lwm yam: plastics), thiab lwm yam. quab yuam (Qhov chaw nruab nrab ntawm cov nplaum thiab cov khoom sib txuas ua ke zoo, kis tau zoo sib xws thiab muaj qee qhov sib qoos thiab cov khoom ua kom muaj "ntau yam khoom" , zoo zoo thiab cov neeg siv khoom noj khoom haus.
1. Screws tuaj yeem ntsuas nrog vipier caliper, uas yog ib qho hnyav, ntsia hlau-ntxig rau sab hauv uas muab tso rau hauv ib lub phab ntsa ntiv taw kom tiv thaiv cov ntsia hlau uas kho qhov khoom siv;
2, lub tshuab kuaj lub tshuab, microscopy hu ua kub, nws yog los ntawm (tōng guò) fastener erosion corrosion, muab tso rau pem hauv ntej siv micrometer microscope magnification, txheej thickness ntsuas seem;
3, kev siv cov cuab yeej tsim nyog, cov qauv tsim, yog tias muaj khoob, yuav ua rau yooj yim tsim hluav taws ntim ntawm geometric mob;
4, kos lub taub hau ntawm lub hau ntswj, muaj lub taub hau eccentric, gimmick, lub taub hau tsis hloov los yog tag nrho, flashing phenomenon, yog li tsis txhob yuav.
Mechanical ntau lawm yog ib txoj kev ceev faj (heev chéng), thiab lub luag hauj lwm yuav tsum tau ua yog tseem ceeb heev. Txawm tias muaj me me ntsia hlau yuav tsis raug ignored. Nws yog kev hwm rau lub neej thiab kev lav phij xauj rau zej zog. . Kev cai screws muaj ib qho tseem ceeb ua haujlwm hauv kev lag luam, tsuav yog muaj kev lag luam hauv lub ntiaj teb, qhov kev ua haujlwm ntawm cov ntsia thawv tseem ceeb heev. Screws yog ib qho tsim muaj hauv tib neeg lub neej thiab kev tsim khoom rau ntau txhiab xyoo. Raws li daim ntawv sau npe, nws yog qhov tsim muaj ntau tshaj plaws ntawm noob neej. Cov ntsuas tsis yog tus qauv siv cov khoom fais fab thiab kev ua zauv ntawm qhov khoom siv qhov khoom tig thiab kev sib txhuam, thiab ua raws li cov cuab yeej cuab tam. Screws yog ib lub ntsiab lus rau cov fasteners, hais txhua hnub.