Write the following list of characters into a correctly formed sentence: TungstenHeavyAlloys(WHAs)arethebestchoicewhendesignersinaerospaceanddefenseindustriesrequireamaterialwhichcombineshighdensity,goodmechanicalstrengthandwhichiseasilymachined.
Tungsten Heavy Alloys (WHAs) are the best choice when designers in aerospace and defense industries require a material which combines high density, good mechanical strength and which is easily machined.