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(yàn)應(yīng)用的上向水平分層充填采礦法、機(jī)械化上向進(jìn)路分層充填采礦法及機(jī)械化下向進(jìn)路分層充填采礦法的工藝特點(diǎn)，并提出了幾點(diǎn)改進(jìn)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(hù)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(diǎn)及對(duì)弧焊機(jī)的特殊要求進(jìn)行了剖析，介紹了適用該工藝方法的幾種品牌焊機(jī)，對(duì)工程施工單位及焊機(jī)制造廠商具有一定參考價(jià)值。

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

對(duì)中國(guó)第一汽車集團(tuán)公司供熱管網(wǎng)工程進(jìn)行介紹,對(duì)長(zhǎng)距離大管徑金屬管道焊接中的高效焊接工藝方法進(jìn)行簡(jiǎn)要綜述,介紹了管道下向焊施工方法及工藝在工程實(shí)際中的應(yīng)用及注意事項(xiàng),對(duì)下向焊施工方法及工藝進(jìn)行了推廣。

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

下向進(jìn)路高水充填采礦工藝試驗(yàn)研究