Dab tsi yog Lifespan ntawm Round Sling?

Ib puag ncig sling tsis tuaj nrog hnub tas sij hawm stamped ntawm nws daim ntawv lo - tab sis qhov ntawd tsis txhais hais tias nws nyob mus ib txhis. Raws li EN 1492-2, European tus qauv rau roundslings, kev txwv kev ua haujlwm (WLL) thiab kev nyab xeeb kev nyab xeeb tau teev tseg, tab sis kev pabcuam lub neej nyob ntawm kev siv tiag tiag. Qee cov tuam txhab lag luam qhia txog lub neej ntev tshaj plaws ntawm 10 xyoo los ntawm kev siv thawj zaug hauv cov xwm txheej zoo.