Cho tốc độ quay của bánh dẫn là 15 vòng/phút đường kính của bánh dẫn là 20 đường kính của bánh bị dẫn là 80 tính tốc độ quay của bánh bị dẫn

sorry i don't know china

Explanation:

if you suspect that your immediate supervisor, department manager, or company is engaging in something unlawful you must do your best to end the misconduct immediately while also protecting yourself, your livelihood, and your family’s future.

amazon is a website were you shop cosmetics such as clothes, electronics and food. amazon also makes there own thechnology such as kindle book readers and tablets or the alexa which is an inteligent ai. and they also have a streaming service which is called prime video.