| 摘要 |
<p>A thermoplastic heat-fusion pipe fitting system comprising a thermoplastic heat-fusion pipe fitting having a body portion to accommodate pipe and a shaped portion bearing a code indicative of the amount of heat required to effect fusion of the fitting, means for heating the fitting, means for sensing and decoding the code, and control means responsive to information decoded from the code for regulating the amount of heat applied by the heating means to the fitting.</p> |
