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直插无源石英晶振HC-49S
直插无源石英晶振 48M 49.152M 49.92M 50M 58.35M 60MHZ HC-49S
49.92MHZ有源晶振 49.92M晶振 7050-2016封装 1.8-3.3V SIT8008
硬质钨钢球合金球49.9/49.905/49.91/49.915/49.92/49.925mm钢珠
苹果绿手镯和田玉碧玉
