pipeless

pipeless

1. pipeless triple valve

无管三通阀

2. pipeless heating and ventilation

无管供暖与通风设备 无管式采暖通风

3. pipeless system of heating

无管式采暖系统

4. warm-air pipeless heating

无管热风采暖

5. The application of pipeless ultra-fine powder fire extinguishing system in cable tunnel

无管网超细干粉灭火系统在电缆隧道中的应用

6. The practice of subterrene drilling indicates that this method not only adapts to geothermal well, but also is a new pipeless reinforcement method to be applied widely.

热熔钻进的实践证明，该方法不仅适用于地热钻井，而且也可以作为一种新的无套管护壁方法推广应用。