余杭需牢記填料改集式密封的這些安裝要領
常用的(de)密(mi)(mi)(mi)封型(xing)式(shi)主要有填(tian)(tian)(tian)料(liao)密(mi)(mi)(mi)封、機(ji)械密(mi)(mi)(mi)封等(deng),填(tian)(tian)(tian)料(liao)密(mi)(mi)(mi)封。填(tian)(tian)(tian)料(liao)改集式(shi)密(mi)(mi)(mi)封是一(yi)種較為原始的(de)接觸式(shi)密(mi)(mi)(mi)封,具有結構簡單、成本低、更換簡便等(deng)優點,由于這些優點,因而(er)在(zai)石油工(gong)業...