These cooling sticks are 7.6-meter-long steel tubes drilled into the soil; they contain ammonia, which draws latent heat out of the soil as it evaporates.
这些钻进土壤的冷却钢管有7.6米长，里面装有氨水，能够吸收土壤中的潜在热量。
2
Introduced the LFNH-DW2001 ammonia nitrogen on-line monitor meter the principle of work, the work flow and the routine maintenance and the common breakdown remove the method.