The whole measuring system consists of four identical subsystems which are symmetrical and fixed in space.

则整个测量系统可看成由四个这样的子系统构成,并且四个子系统在空间上呈对称分布、位置固定.

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The whole measuring system includes four identical subsystems that are symmetrical and fixed in space.

整个测量系统可看成由四个子系统构成,并且四个子系统在空间上对称分布、位置固定.

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