Magnetic field shielding: tiv thaiv txoj hauv kev, cov hauv paus ntsiab lus thiab lawv cov lus piav qhia luv luv. Cov yam ntxwv tseem ceeb ntawm cov ntxaij vab tshaus. Kev xaiv ntawm kev tsim thiab cov khoom siv. Kev siv cov ntaub nplaum nplaum thiab cov ntaub ntawv polymeric. Kev tiv thaiv kab mob sib kis