请在订购时加以指定说明。
当用于高速流体（湍流）或热循环应用时，为了避免松开，螺纹阀座环应该锁焊在阀体上。请在订购时加以指定说明。
Threaded seat rings should be lock welded to the body when used in high velocity (turbulent) or thermal cycling services to avoid loosening. Please specify.
如果阀门用在高速流体(湍流)或热循环应用环境中，则螺纹阀座环应该锁焊到阀体上，避免松落。请在订购时加以指定说明。
Threaded seat rings for valves in services with high velocity turbulent flow or thermal cycling should be lock welded to the body to avoid loosening. Please specify.
如果阀门用在高速流体(湍流)或热循环应用环境中，则螺纹阀座环应该锁焊到阀体上，避免松落。请在订购时加以指定说明。
Threaded seat rings for valves in services with high velocity turbulent flow or thermal cycling should be lock welded to the body to avoid loosening. Please specify.
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