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1·The nozzle insert can either be injection moulded from plastic or can consist of metal.

该喷嘴嵌件既可以由塑料用注塑法生产，也可以由金属制成。

2·The local ablation of thermal insulation barrier in nozzle convergence region and of throat insert is analysed.

分析了喷管收敛段绝热层及喉衬的局部烧蚀问题；

3·The erosive property and principle of copper-infiltrated graphite as solid rocket motor(SRM) throat insert and tailpipe nozzle bushing are presented.

介绍了石墨渗铜材料作为固体火箭发动机（SRM）喉衬与长尾管衬套的烧蚀特性和机理。

4·When using valve nozzle for easy drain, please insert nozzle into the sealing cap and screw the cap onto the discharge valve with gasket and tighten it.

如使用阀门接管，请将其连同垫圈套在螺纹盖中，拧回放料阀并拧紧。