However, NC devices have high prices and there’re some volatile factors when NC system is under the practical operation, which incumber the testing and operation process.
It has been produced in our country, all by oxalyl chloride technological process.For using oxalyl chloride, so it has high price and low occupy in the market.
Mechanics and tradesmen who come in person to the forest on no other errand, are sure to attend the wood auction, and even pay a high price for the privilege of gleaning after the woodchopper.