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螺旋式聲測管
拔換原管(guan)(guan)重(zhong)下(xia)新(xin)管(guan)(guan);或(huo)用原導(dao)管(guan)(guan)刺進(jin)續(xu)灌(guan),但灌(guan)注前均應將(jiang)進(jin)入(ru)導(dao)管(guan)(guan)內(nei)的(de)水(shui)和沉淀土用吸泥和抽水(shui)的(de)方(fang)法吸出。如(ru)需重(zhong)下(xia)新(xin)管(guan)(guan),必需用潛水(shui)泵將(jiang)聲(sheng)測管(guan)(guan)內(nei)的(de)水(shui)抽干(gan)
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