Partner in China Hangzhou Sergas Engineering Co., Ltd Mr. Zeng Zhi Room 1001 Modern Imagic Mansion-West building Xiacheng district Hangzhou 310004 Phone 0086 571 85819086 Fax 0086 571 85819087 sergas@263.net Hangzhou Advanced Control Engineering Co., Ltd Mr. Liu Wenxian Room 1001 Modern Imagic Mansion-West building Xiacheng district Hangzhou 310004 Phone 0086 571 85819086 Fax 0086 571 85819087 adcontrol@163.com Hongkong Leser Safety Controls Ltd Mr. Floyd Qin Room 610, Huakang building 109# Zhenxin Road, Futian district Shenzhen 518031 Phone 0086 755 8326 6850-801 Fax 0086 755 83266528 leserchina11@vip.163.com Hongkong Leser Safety Controls Ltd Mr. Lihongye Room 1103, No. 3, 150 long Linxin bei road, Pudong district Shanghai 200127 Phone 0086 21 58397614 Fax 0086 21 58397564 leserchina31@163.com