For difficult global supply of liquid helium, two in advance to confirm the supplier's plan, do not do the week and the transfer switch, to ensure the supply of production
For liquid helium in global supply difficulties, confirm the supply plans of the two suppliers in advance, make weekly switching and handover, and ensure the supply of production
For the liquid helium with global supply difficulties, confirm the supply plan of two suppliers in advance, make weekly switch and handover, and ensure the supply of production<br>