A hyperbola approaches but does not meet its asymptote.双曲线逐渐接近它的渐近线但不相交.An asymptote is a line or curve that approaches a given curve arbitrarily closely.所以渐近线也可能是一条曲线.不过方便起见我们都讨论渐近“线”.He and the design firm Asymptote co...
Lithograph was introduced from China to Europe.印刷术是从中国传入欧洲的。A print of a woodcut , lithograph, or other engraved material, especially when reproduced in a book.铅版:木刻, 平版或其它雕刻材料的印模, 尤指在书中复制时的印版.The lithography and the man...
SB 9917 anti - weather acrylic acid polyurethane coating is two components anticorrosive coating.SB9917丙烯酸聚氨酯耐候漆是双组份、性能优良的防腐涂料.The WC - CO coating produced by electrospark deposition on alloy can effectively improve subs...
Suitable for different regions, different types of soil and agronomic requirements of operation can be planted.适合于不同地区 、 不同类型的土质和农艺要求均可播种作业.The result showed that the differences of agronomic traits among different sowin...