Seamless pipe production process, there are two: Cross - rolling method ( Meng Mannesmann France ) and the extrusion method. 无缝管的生产工艺有两种: 斜轧法 ( 孟内斯曼法 ) 和挤压法.
She looked doubtfully at him, at the low shanty.她犹豫不定地看着他, 看着那间矮棚屋.His eyes rested on her doubtfully.他可疑地注视她.We eyed each other amicably if doubtfully.我们彼此用一种怀疑的,但却友好的眼光看待对方.She doubtfully led him the way to the hallroom...
High rates of return can be earned on these investments.这些投资可能会有很高的回报率。Long-term stock market investments have produced superior returns compared with cash deposits.股票市场长期投资的收益比现金存款要高。With the markets being so volatile, ...