This Pro - Seminar provides one such avenue to achieve this goal through the optional service project.

研讨会通过可选的服务方案,为达到这个目标提供了途径.

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As an optional service, we have the capability of tracking cylinders to and from customers.

作为一项可以选择的服务, 我们有追踪来往于消费者的钢瓶的能力.

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