Daim Ntawv Qhia Roj Hmab
Cov roj thiab pa roj pob zeb diaphragm cov ntsaws ruaj ruaj, nres lub tshuab nqus cov pa diaphragm, cov cua nres qhov diaphragms, cov hlua tsav plaub lub tshuab khiav tawm cov pa diaphragms thiab cov pa-regulator cov pa diaphragms.
