Cov raj perforated thiab Saron raj feem ntau yog siv hauv npuas diffusers. Qhov txoj kab uas hla ntawm cov yeeb nkab perforated yog 2-3 hli, thiab cov roj ntws ntawm cov qhov ncauj tsis pub tsawg dua 10m / s los tiv thaiv kev thaiv. Sage yog hluavtaws fiber. Sharon raj siv lub raj hlau ntxeem tau raws li lub cev pob txha, thiab Sharon hlua yog qhwv ib ncig ntawm lub raj.
Muaj ntau qhov me me hauv lub raj hlau. Tom qab cov cua compressed khiav tawm ntawm lub qhov me me, vim yog qhov elasticity ntawm Saron, cov kua sib xyaw tuaj yeem raug nyem rau hauv daim ntawv ntawm npuas los ntawm txoj hlua ntawm txoj hlua.