船闸
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(船(chuán )闸(zhá ),船(chuán )闸(zhá ))
使(shǐ )船(chuán )只(zhī )或(huò )竹(zhú )、木(mù )筏(fá )能(néng )在(zài )闸(zhá )、坝(bà )上(shàng )下(xià )游(yóu )水(shuǐ )位(wèi )差(chà )较(jiào )大(dà )的(de )航(háng )道(dào )间(jiān )通(tōng )行(háng )的(de )水(shuǐ )工(gōng )建(jiàn )筑(zhù )物(wù )。有(yǒu )闸(zhá )室(shì )和(hé )前(qián )后(hòu )闸(zhá )门(mén )。船(chuán )只(zhī )驶(shǐ )入(rù )闸(zhá )室(shì )后(hòu ),关(guān )闭(bì )后(hòu )面(miàn )的(de )闸(zhá )门(mén ),经(jīng )过(guò )充(chōng )水(shuǐ )或(huò )泄(xiè )水(shuǐ ),使(shǐ )闸(zhá )室(shì )中(zhōng )的(de )水(shuǐ )位(wèi )与(yǔ )上(shàng )游(yóu )或(huò )下(xià )游(yóu )航(háng )道(dào )的(de )水(shuǐ )位(wèi )齐(qí )平(píng )或(huò )相(xiàng )近(jìn ),然(rán )后(hòu )开(kāi )启(qǐ )前(qián )面(miàn )的(de )闸(zhá )门(mén ),船(chuán )只(zhī )便(biàn )能(néng )驶(shǐ )出(chū )闸(zhá )室(shì )而(ér )航(háng )行(háng )。
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