Procedure to accelerate the diffusion phenomena in metals, especially in the iron, through the formation in the object of the dissemination, of a fall of thermoelectric power, convenient
ES180256A1
IMPROVEMENTS in the construction of valves for pneumatic chambers and vessels subjected to air, gas or liquid pressure
ES180252A1
Procedure for the hardening of iron and steel in cyanogenated baths
ES180253A1
Procedure for the formation of nitride layers on steel and iron
