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1·Emergency shutdown valve is in a kind of hydraulic control valve.

紧急关闭阀是水力控制阀中的一种。

2·Emergency shutdown valve is in recent years developed a new product.

紧急关闭阀是近几年开发出来的新产品。

3·After the emergency shutdown valve valve through the user's program is better.

紧急关闭阀阀后直通用户的方案比较好。