Cov qauv ntsuas qhov ntsuas rau qhov ntsuas kub tsis tu ncua thiab cov av noo ntsuas Chambers.

Qhov ntsuas kub thiab av noo tsis tu ncua yog tsim rau hluav taws xob, hluav taws xob, xov tooj ntawm tes, kev sib txuas lus, ntsuas, tsheb, cov khoom siv yas, hlau, khoom noj, tshuaj, khoom siv hauv tsev, kev kho mob, aerospace thiab lwm yam khoom zoo. Ua raws li tus qauv: GB/T5170. T2423.3-2006 test Ca, GB/T2423.{10}} test Db.