... ,short delivery time 2011 KHT rock cracking agent,dexpan,non explosiv demolition agent is a new-type, environmental and convenient ... materials in China, KHT rock cracking agent,cracking agent,on explosive cracking agent, it has advantages such as big ... and homeowners in China. KHT rock cracking agent,cracking agent,on explosive cracking agent,Specification: Executive standard: JC506-92Color: grey ...