发明授权
US4369831A Protector for molten metal casting stream 失效
熔融金属铸造流保护器

Protector for molten metal casting stream
摘要:
A protector for a molten metal casting stream includes first and second pipes telescopically connected to each other to form a pipe assembly, and an urging means mounted about the pipe assembly so as to force it to extend in the lengthwise direction.
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