...crete with MFA of high AMF contents 低强度等级泵送高石粉机制砂混凝土的研究 Low-Alloy High-Strength Steel 低合金高强度钢 low-pressure type bursting-strength tester 低压冲裂强度测定仪 ..
The quality of resistance spot welding of low carbon steel and highstrengthlowalloysteel is studied by looking into the dynamic voltage characteristics of the electrodes.
本文通过对电阻点焊电极电压动态特性的分析，研究了低碳钢及低合金高强度钢电阻点焊的质量问题。
2
For welding low-alloy and highstrengthsteel with corresponding strength grade.
用于相同强度等级的低合金高强钢的焊接。
3
There are four broad classifications of steel: carbon steels, alloy steels, high-strengthlow-alloy steels and stainless steels.