139 hole design: This may refer to the number of bubble outlets in the bubble machine, which can produce 139 bubbles per operation.
Sprinkler design: The bubble machine may have a similar appearance or function to a sprinkler, and may have a water tank for storing bubble liquid.
Bubble machine function: The bubble machine may have an automatic bubble making function, the user only needs to add the right amount of bubble liquid, and then start the machine to produce a large number of bubbles.
Application scenario: Due to the large amount of bubble generation and sprinkler design, this type of bubble machine may be suitable for outdoor activities such as children's games, celebrations, parties or weddings.