Hoʻokumu ʻia nā kānana mākēneki me nā mea magnetic ikaika a me kahi pale kānana pale. He ʻumi ka nui o ka ikaika adhesive o nā mea magnetic maʻamau a hiki iā lākou ke hoʻopili i nā mea haumia ferromagnetic nui micrometer i kahi hopena kahe wai a i ʻole ke kūlana kahe kiʻekiʻe. Ke hele nā mea haumia ferromagnetic i ka hydraulic medium ma waena o nā apo hao, hoʻopili ʻia lākou i nā apo hao, a laila e loaʻa ai ka hopena kānana.