Kev kho saum npoo ntawm lub qhov rooj hluav taws kub yog electrostatic txau (ntoo zoo nkauj saum npoo yog xaiv tau). Cov tsos ntawm cov khoom no ntawm steel hluav taws qhov rooj muaj ntau yam sib txawv ntawm lub qhov rooj. Cov qauv tsim tshwj xeeb thiab cov kab du qhia txog kev ua kom zoo nkauj tag nrho ntawm cov khoom, yog li qhia cov yam ntxwv ntawm kev coj ncaj ncees thiab kev zam.

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