Surface seamless steel rail

A surface-seamless steel rail, comprising:

• a right connecting part located on one side of said steel rail;
• a left connecting part located on the other side of said steel rail;
• and
• a seamless spring piece located on the top side of said steel rail,
• wherein both said left connecting part and said right connecting part include a plug portion in embedded engagement with each other,
• said seamless spring piece includes a fixed portion at one end and a free portion at the other end, said fixed portion is fixedly connected on the top side of said plug portion of one of said left connecting part and said right connecting part,
• the other of said left connecting part and said right connecting part is provided with an arc-shaped channel at its interior body, said arc-shaped channel is below the top surface of the other of said left connecting part and said right connecting part, said free portion of said seamless spring piece is inserted into said arc-shaped channel to completely eliminate the gaps between said left connecting part and said right connecting part when joined together.