Packing gland can't be screwed too tight, keep liquid leaking drop by drop, otherwise it maybe cause to packing burn down.
填料压盖不能拧得过紧，保持液体有滴状泄漏，否则泵运转时可能导致填料烧坏。
2
Polyethylene in the innermost layer forms the seals that make the package liquid-tight and provides a protective coating on the exterior to keep the package dry.
聚乙烯在内心层形式的封条，使整套液气密性，并提供一个保护性涂层对外部，以保持包装干燥。
3
Spontaneous potential (SP) of a formation has tight relationship with salinity of formation liquid, the salinity of mud filtrate in invaded zone affects SP log considerably.