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The black key and the white key have the same function, a black key sandwiched between the two white keys is a whole tone, and the two white keys without a black key are a semitone, such as 3 to 4 or 7 to 1, which is a semitone. Is that understandable.
This is a layer of glaze on the surface of the floor tiles damaged, if not serious, you can first use a towel dipped in rice vinegar sassafrass and then sassafrass wax.
Here's how to remove tung oil from furniture:
Materials: dish soap, white vinegar, laundry detergent, rag. >>>More
Tips for removing glue from furniture.
1. Remove the glue trace from vinegar. >>>More
1 Wash with absolute alcohol (absolute ethanol) and gently wipe with a cloth dipped in alcohol to remove. >>>More
1. Self-adhesive detergent: If it is white foam double-sided tape, it is easy to get rid of it with self-adhesive cleaning agent. Note: >>>More