Sealing bottle plug and distillation flask with sealing bottle plug for trace distillation range instrument
The utility model belongs to the field of chemical instruments, and particularly relates to a sealing bottle plug and a distillation flask with the sealing bottle plug for a trace distillation range instrument, the sealing bottle plug comprises a bottle plug body and a sealing ring, the lower end of...
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Format: | Patent |
Sprache: | chi ; eng |
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