利用了新技术，把旧的设备进行改造。
The old equipments were transformed using the new technology.
改造也可以使之与不断变化的联邦和各州的安全法规旧设备。
Retrofits can also bring older equipment into compliance with changing federal and state safety regulations.
改造也可以使之与不断变化的联邦和各州的安全法规旧设备。
Retrofits can also bring older equipment into compliance with changing federal and state safety regulations.
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