Since 1978 bentley has also been producing tubing for french distribution through the firm of jordan and sons , paris .
自1978年来,本公司通过巴黎的儒尔当父子公司一直在为法国的销售生产塑料管道。
In addition to environmental considerations such as the need to reduce both vermin and stench , the sheeting traps methane gas , allowing it to be collected by a network of well-heads and rubber tubing .