Complicated formation condition and underground pipe network condition are the important factors that influence the quality of guided drilling of trenchless technology.
地层和地下管网条件复杂是影响非开挖导向钻进质量的重要因素。
The type of fouling and reasons causing fouling in underground pipe-network of pharmaceutical refrigerating system were described in this paper.
阐述了药厂冷却系统中沉积物的类型及产生的原因。
The type of fouling and reasons causing fouling in underground pipe-network of pharmaceutical refrigerating system were described in this paper.
阐述了药厂冷却系统中沉积物的类型及产生的原因。
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