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Please help me I need help with all the blanks

Please help me I need help with all the blanks
asked 48.3k views
2 votes
Please help me I need help with all the blanks

Please help me I need help with all the blanks-example-1
asked
User Goltsev Eugene
by
7.8k points

1 Answer

3 votes
i don't know everything but I know 14th and 15th
14 is ultrasonic
and
15 is infrasonic
answered
User Yorick De Wid
by
7.8k points
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