Shenhai Kuphulika-Umboni
Miyezo yachitetezo imaphatikizapo nambala ya IP yotsatiridwa ndi manambala awiri. Nambala yoyamba kumanzere imasonyeza mulingo woletsa fumbi, pamene nambala yachiwiri ikuimira mlingo wotsimikizira madzi.
Nthawi zina, ogula, kufunafuna mitengo yotsika kapena kusamvetsetsa bwino zachitetezo, Atha kusankha ma mota osaphulika okhala ndi ma IP otsika kuposa momwe amafunikira. Mwachitsanzo, posankha mota yosaphulika kwa ntchito monga kuyendetsa mphero ya malasha pamalo opangira magetsi, ndikofunikira kugwiritsa ntchito yomwe ili ndi IP54, m'malo mokhazikika kwa IP44 kapena ngakhale IP23 motors.