介绍了钢管接触法超声波探伤缺陷定位方法——手指蘸油触摸法，分析了利用此种方法进行缺陷定位的理论依据。
The author introduces a pipe defect locating method by contact type ultrasonic detection — finger oil dipping touching method and analyses the theoretical basis of defect locating by this method.
环氧树脂涂塑钢管适用于给排水、海水、温水、油、气体等介质的输送，聚氯乙烯涂塑钢管适用于排水、海水、油、气体等介质的输送。
Delivery of epoxy resin coated steel pipe is suitable for water, water, water, oil, gas and other medium, PVC plastic pipe for drainage, water, oil, gas and other media delivery.
断绳安全装置滑道加油时，油不得流入制动瓦和导轨架无缝钢管之间。
When adding oil to the rope-break safety instrument, the oil shouldn't flow to the brake and seamless steel pipe.
介绍了玻璃内衬管的特性，对玻璃内衬管道与普通钢管道低温集油中的性能进行了对比分析。
Comparison and analysis on performance between glass liner pipeline and ordinary steel pipeline under low temperature oil gathering are carried out.
钢管材质选用碳素钢，活塞杆选用碳钢，油封采用进口高级精制品，耐油，耐磨，耐压，耐腐蚀。
Steel material selection of carbon steel, carbon steel, piston oil imported advanced masterwork, oil resistance, wear-resisting, compression, corrosion resistance.
无缝管线管主要是用于油井或气井的井口附近输送高压油、气的无焊缝钢管。
Seamless steel line pipe is a kind of steel pipe without seams, which is mainly used in the places near the mouth of oil well or gas well to transmit oil or gas with high pressure.
无缝管线管主要是用于油井或气井的井口附近输送高压油、气的无焊缝钢管。
Seamless steel line pipe is a kind of steel pipe without seams, which is mainly used in the places near the mouth of oil well or gas well to transmit oil or gas with high pressure.
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