Does the "medical waste" sign on the biochemical movie mean anything else?

The sign is the international "Medical Waste" sign, and the pointy one is the "Biohazard" sign outside the bio lab, nothing else. What you're trying to say is that it's the same sign that's used in movies involving biological labs and the like, isn't it? Because this sign is international, so the movie involved in this area are used in this logo, you can save a lot of explanation, such as a sign painted skulls, people know at a glance is dangerous, and saves the trouble of using a variety of languages to write the "danger", and signs are generally more than the text can give a person the first shock of the first feeling, which is to the Psychologically speaking, that's why there are all kinds of warning symbols, and movie directors may also want to achieve this effect ^__^