In 1988, a dollar sale of new injection molding machinery in the U. s. was approximately 65% of total major polymer machinery sales volume; this included 4,600 injection molding units.
1988年，美国新的注塑成型机械销售约占全部主要聚合物机械销售量的65%，其中包括4,600台注塑成型设备。
This paper makes experimental study of stress character of reinforced concrete beam's oblique section in negative area strengthened with U-jackets carbon fiber reinforced polymer (CFRP).
研究了外部U形粘贴碳纤维布加固钢筋混凝土梁负弯矩区段斜截面的受力特性。
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