Kev Ruaj Ntseg Zog

Kev ruaj ntseg Zaj duab xis, lus nruj me ntsis tsis tuaj yeem raug hu ua nyias zaj duab xis, tab sis laminated diaphragm, feem ntau thawj cov khoom thickness hauv 7mil uas yog li ntawm 0.175 hli, cov khoom nruab nrab hauv 0.30 hli uas yog hais txog 12mil, theem siab txog 0.5 hli 22mil.