Filling barrel was accomplished by semiautomatic filler machine and jointed filling arm, and the filling arm can reach the four barrels in turn.
装桶由半自动化装料机和有关节的装料臂共同完成。有关节的填充臂能依次达到四个桶。
2
It takes up to four barrels of water to generate one barrel of tar-sands crude, and 20% of Canada's natural gas (a clean fuel) is used to produce oil (a dirty one).
The Libyan military on both sides are using single, two and four-barrel weapons of this type, again typically of Soviet or Chinese manufacture like the ZPU-2 or ZPU-4.