aIn the film blowing process a plastic melt is extruded at a constant flow rate through annular die to form a continuous tube, which is simultaneously drawn upward by a take-up device and inflated by air introduced at the die exit. 在影片吹的过程每塑料融解被挤压以恒定的流速通过环型模子形成...
Apache Spark is an open source data processing and analytics engine that can handle large amounts of data -- upward of several petabytes, according to proponents. Spark's ability to rapidly process data has fueled significant growth in the use of the platform since it was created in 2009, ma...