我厂在工艺热力管道上需要大量无縫弯头,但目前国內还不能生产供应,为了滿足施工的需要,我厂从1956年开始試制,最初采用土办法用人工压制,經过了一年多的吋間,50多次的反复試騐,克服了許多困难,終于在去年10月試制成功。現在已能生产2 I plant in the process of heat pipe requires a large number of seamless elbow, but the current domestic production and supply can not yet, in order to meet the needs of construction, our plant from 1956 trial production, the initial method of artificial suppression with soil, after a year Many inches, more than 50 repeated tests, to overcome many difficulties, and finally in October last year successful trial. Now able to produce 2