The radial horizontal bores can connect the new flowing channels of gas to increase the coal-bed methane production.
这些径向水平钻孔的形成可以沟通新的瓦斯流动通道，提高煤层气产量。
2
The system — called the nutrient Film Technique, or NFT — merely requires a slope, any-thing from near horizontal to vertical, with channels for dilute nutrient solution to flow down.