Hauj lwm lawm
Kev tsis
Cov roj hmab diaphragm yog ib daim nyias nyias uas feem ntau yog ncig hauv cov duab thiab khi ib ncig ntawm cov npoo. Lub luag haujlwm tseem ceeb ntawm lub diaphragm yog ua raws li lub foob ntawm ob chav. Roj hmab diaphragms tuaj nyob rau hauv ntau yam duab thiab ntau thiab tsawg, nrog rau kev cai molded diaphragm configurations.
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