Gas turbine moving blade platform

A gas turbine moving blade platform comprising:

• a first cooling passage provided in said platform on a first side of the moving blade and having first and second ends, wherein said first end of said first cooling passage communicates with a leading edge passage of the moving blade, and said second end of said first cooling passage opens in a first side end surface of said platform;
• a second cooling passage provided in said platform on a second side of the moving blade and having first and second ends, wherein said first end of said second cooling passage communicates with the leading edge passage of the moving blade, and said second end of said second cooling passage opens in a second side end surface of said platform;
• a first cover for closing said second end of said first cooling passage in the first side end surface of said platform;
• a second cover for closing said second end of said second cooling passage in the second side end surface of said platform;
• and
• at least three linear cooling passages formed in said platform, each of said linear cooling passages communicating at one end with one of said first and second cooling passages and opening at another end in a rear end surface of said platform.