Nigeria is located in the southeast of West Africa at 6 27 ′ N and 3 24 ′ E, at the apex of the west coast of the Gulf of Guinea in Africa. Its neighbors include Benin in the west and Niger in the north. It borders Chad in the northeast, Cameroon in the east and southeast, and the Gulf of Guinea in the Atlantic Ocean in the south.
NG means to shoot again. Usually one shot is the best requirement. However, because the actor's lines are wrong, his expression is not in place, his physical condition is not good, the shooting scene is not suitable or there is noise, etc., the director will shout "ng", which means asking for a remake (that is, ng once).
Precautions for storage of nitroglycerin: Store it in a cool, dry and ventilated special explosive warehouse. Stay away from fire and heat sources. The reservoir temperature should not exceed 30℃. Keep the container sealed. Should be stored separately from oxidants, active metal powders, acids and edible chemicals, and should not be mixed. Adopt explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are easy to generate sparks. The storage area should be equipped with emergency response equipment for leakage and suitable accommodation materials. No vibration, impact and friction.