The technological characteristics of upward horizontal cut and fill stoping,mechanized upward drift cut and fill method and mechanized downward drift cut and fill method are introduced and a few points to improve them are put forward.

介紹了焦家金礦先后試驗應(yīng)用的上向水平分層充填采礦法、機械化上向進路分層充填采礦法及機械化下向進路分層充填采礦法的工藝特點，并提出了幾點改進意見。

Analysis of heating line weld defects by down weld with fibrin electrode;

供熱管道纖維素焊條下向焊焊接技術(shù)分析

Introduced here is the advanced flux cored down weld technology.

介紹了藥芯焊絲自保護下向焊技術(shù)。

Application of technology of metal pipe full-position downward welding in a construction;

金屬管道全位置下向焊技術(shù)在某工程中的應(yīng)用

The article analyzed the feature of downward welding technology and the special demand for arc welding machine.

就管道焊接中的高效焊工藝方法———管道下向焊的工藝特點及對弧焊機的特殊要求進行了剖析，介紹了適用該工藝方法的幾種品牌焊機，對工程施工單位及焊機制造廠商具有一定參考價值。

It also presents the application of downward welding method and craft in the practice and caution.

對中國第一汽車集團公司供熱管網(wǎng)工程進行介紹,對長距離大管徑金屬管道焊接中的高效焊接工藝方法進行簡要綜述,介紹了管道下向焊施工方法及工藝在工程實際中的應(yīng)用及注意事項,對下向焊施工方法及工藝進行了推廣。

Experimental study on new downward drift mining technology with backfilling by high water content materials;

下向進路高水充填采礦工藝試驗研究