The present invention relates to lead-less piezoelectric ceramic composition and is especially one kind of lead-less Li-Na-K niobate piezoelectric ceramic and its preparation process.
一种高居里点铌酸钾钠锂系无铅压电陶瓷及其制备工艺，涉及一种性能优良的无铅压 电陶瓷组合物的配方及制备工艺。
Also have paler-k natural Cream-colored, reseda, no matter which kind of colour, want to let you feel youthful vitality.
也有淡逸自然的米色、浅绿色等，无论哪种色彩，都要让你感受到青春的活力。
A kind of K drought index and its criterion are made by using spring precipitation and evaporation data of 140 stations in Northwest China from 1971-2000.
用西北地区140个气象站1971～2000年的春季降水、蒸发资料，计算了一种K干旱指数，并制定了干旱标准，分析了西北春季干旱的气候特征。
Using the modulus of smoothness and K-functional, direct and inverse theorems of simultaneous approximation for a kind of multivariate trigonometric polynomial operators are established.
利用光滑模和K -泛函给出了一类多元三角多项式算子同时逼近的正逆定理。
The spouse relationship was firstly protected as a kind of rights by law happened in U. k, u.
配偶关系作为一种权利制度是由英、美、法等国家率先规定在法律之中的。
The Velcade rebate program is the first of its kind in the U. K. and may be a harbinger of things to come there and elsewhere.
万珂退款计划是在英国为首次发生的此类事件，并为今后此类事件的发生提供了预兆。
While the machine is the first of its kind in China, many are in use around the world including in U. S. , Germany, Spain, U. K. and Italy.
这台机器在中国是首次安装，现在有许多这样的机器在包括美国、德国、西班牙、英国和意大利在内的世界各地应用。
While the machine is the first of its kind in China, many are in use around the world including in U. S. , Germany, Spain, U. K. and Italy.
这台机器在中国是首次安装，现在有许多这样的机器在包括美国、德国、西班牙、英国和意大利在内的世界各地应用。
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