The weapon never went into production, possibly because the dartshad very little penetrating power.
这种武器从未投入生产，可能是因为飞镖的穿透力非常小。
Several prototypes were created but they never went into full production.
设计了好几种原型但没有一个能规模生产。
Several prototypes were created but they never went into full production.
设计了好几种原型但没有一个能规模生产。
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