To prevent damage from repeated freeze-thaw cycles, the bottom of the foundation must be below the frost line.
为了防止反复冰冻解冻循环的损害，地基的底部必须在霜线以下（此处的土壤不受地表冰冻的影响）。
2
This paper introduces the structural characteristics working principle and main parts structural and control design of the SDX big splint freeze tunnel line.
本文介绍了SDX大托板速冻隧道线的结构特点，工作原理及主要部件的结构设计。
3
Has produces the normal temperature to maintain freshness specially the Ukraine winter noodles production line, the quick-freeze noodles production line and lives the fresh noodles production line.