The driver used the dial mounted on the dash to control the flow of air into the vacuum chamber.
盘表控制进入真空管空气流量。
If the check has been crossed in general or special dash, allows holders the words "no flow" indication.
如支票被一般划线或特别划线，持票人可加上“不得流通”字样。
If the check has been crossed in general or special dash, allows holders the words "no flow" indication.
如支票被一般划线或特别划线，持票人可加上“不得流通”字样。
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