Introduced in the paper is a newly developed centring - roll system used on rotary pipe mill.介绍了一种用于斜轧钢管生产的新式定心辊装置.Mainly applied in electric control system of masticator, banbury mixer , and other roll mill etc.我需要“密炼机 ...
I don't have to be a detective to figure that out.我不是侦探也想得出。He buried himself in his detective story again.他又沉浸在他的侦探故事里了。Methods In accordance to the international detective method, acetonitrile ( ACN ) was used as ...