Methods To deduce the shape and size of the surface made by a hammer on a human body according to the injuries and features of the skull fractures in the case,and features and differences of the injuries on the skull caused by the different ends of a hammer could be confirmed by imitating experiment on the body sample.

Local heat treatment of alloy steel hammer;

Development and Applications of Low-alloy Steel Hammers;

Research on Inlay Composite Casting Technology of Bi-metal Hammer;

Squeezing Casting Mould Design of Hammer Head of Hammer Crusher and Its Process;

Repairment of crack in dovetail keyway of C_(13-1) type 1 t double columns steam hammer head;

The main structure of hammer head of new-type hydraulic pressure hammer;

The running conditions the main body of a book is complied with analysing the dyadic crusher of hammer hammerhead and cleading has started off,has expounded and proven the rationality adopt high chromium cast iron able to endure.

This paper aimed at active crusher hammerhead, from the point of view of hammerhend movement and accept force, we research the condition that at arosed the hammerhead gauched and educed the math expression.

This paper expounds the modification and application in production of t he flat hammer and hammerhead, the key parts of the breaker, and points out that the modified high-manganese steel flat hammer and hammerhead can guarantee the safe operation of the breaker effectively, reduce the working intensity, and in crease the economic benefit.