论文部分内容阅读
逆变式弧焊电源的研制
【出 处】
：
焊接研究与生产
【发表日期】
：
1992年3期
其他文献
Morphological and physiological traits of large-panicle rice varieties with high filled-grain percen
Understanding the morphological and physiological traits associated with improved filling efficiency in large-panicle rice varieties is critical to devise strat
阅读是从文字、图片、符号、公式、图表等视觉材料中获取信息的过程，也是一种主动理解、领悟、吸收、鉴赏和评价的思维过程。阅读是一种文化建构，是一种特殊的“精神活动”，能为个体生命成长奠基。阅读能力是个体在阅读活动中自然形成的一种基本能力。数学阅读能力是个体在数学阅读过程中形成的在数学领域内的相关的基本能力，比如对数学的感性认识能力，对数学内在关系的理解能力，对数学的创造性理解能力等。在数学教学活动中，
<正>Our modern society is facing major challenges such as reducing world hunger by increasing protein resources despite an increase in protein demands due to th
白马湖作家群散文创作题材内容丰富,或描写白马湖自然景色,或反映当时的社会生活,或阐述教育思想、抒发内心情感。作品在取材、语言表达等方面独具特色,传递出朴素脱俗、清新
Relationship between physicochemical characteristics of Korean wheat flour and quality attributes of
The purpose of this study is to identify major factors affecting the manufacture and quality of steamed bread,consumed in Southeast Asia including China,Japan,a
Effects ofTinospora tuberculata leaf methanol extract on seedling growth of rice and associated weed
The study was conducted to evaluate the responses of rice and rice weed seedlings(barnyardgrass and weedy rice) at the three-leaf stage to Tinospora tuberculata
Genetic diversity center of cultivated soybean（Glycine max） in China——New insight and evidence for t
Information on the center of genetic diversity of soybean(Glycine max) will be helpful not only for designing efficient strategies for breeding programs, but al
期刊
MAPKs and acetyI-CoA are associated with Curvularia lunata pathogenicity and toxin production in mai
期刊
本文较为详尽地分析讨论了导致ＣＯ２气体保护焊镀铜焊丝锈蚀的诸因素，前处理不力、拉拔工艺不当、热处理不合理、镀铜槽液污染和环境湿度等，并提出了控制焊丝锈蚀、延长焊丝贮存期的