Hangzhou Chengke machinery Co., Ltd. is located the scenery beautiful Hangzhou Qiantang River bank, in the national level economic development zone, this company, by engineer, the engineers and technicians, the administrative personnel and the powder metallurgy which specialized is engaged in the powder metallurgy research friction disk, the brake shoe, the antithesis piece structural element and the paper base nonmetallic material friction disk the copper base powder metallurgy friction disk uses the national standard formula, the mature craft special purpose equipment manufacture becomes, has the higher friction