Common round steel or steel tube may be rolled into solid or hollow twist drill rods by using the said rolling mill.
普通元钢或普通钢管经此轧机后，可直接变成实心或空心麻花钻杆钢。
The invention relates to an improvement method of a core rod of a metal rolled tube, in particular to a hollow core rod used for a planetary rolling mill.
本发明涉及一种金属轧制管的芯棒改进方法，具体地说是一种行星轧机用空芯棒。
A new technique for the recovery of ammonia and phenol from the residual ammonia wastewater of coking mill with hydrophobic microporous hollow fiber membrane absorption has been developed.
采用膜吸收法进行了焦化厂剩余氨水中氨和苯酚的脱除和回收试验。
A new technique for the recovery of ammonia and phenol from the residual ammonia wastewater of coking mill with hydrophobic microporous hollow fiber membrane absorption has been developed.
采用膜吸收法进行了焦化厂剩余氨水中氨和苯酚的脱除和回收试验。
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