平衡活度钻井液 balanced activity drilling fluids 平衡活塞 balance piston; balancing piston 平衡减压阀 balance pressure reducing valve ..
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rotor thrust balance piston 转子推力平衡活塞
balance piston assembly 平衡活塞总成
cup leather for balance piston 平衡活塞皮碗
leather packing for balance piston 平衡活塞皮垫
joint for balance piston 平衡活塞杆接头
rubber follower for balance piston 平衡活塞橡皮环
balance piston box 平衡活塞箱
balance piston type 平衡活塞式
washer for balance piston 平衡柱塞垫圈
Sealing coring tools mainly consists of external threaded adapter, balance piston, limit joint, inner and outer barrel, core catcher, locating pin, sealing head and coring bit.
密闭取心工具主要由外螺纹接头、平衡活塞、限位接头、内外筒、卡箍岩心爪、定位销、密封头、及取心钻头等部件组成。
Hydraulic valve block balance weight piston sleeve has thin wall, high precision of geometry dimension and strict roughness, and its quality determines the lifetime of balance weight directly.
缸块平衡块的活塞套壁薄，几何尺寸精度要求高，粗糙度要求严格，其质量好坏直接决定平衡块的寿命。
Rotary piston pump is a volume type vacuum pump and is applied widely, but there has been no method for exactly calculating dynamic balance of rotary piston up to the present.
滑阀真空泵是一种容积式真空泵，在各工业领域广泛应用。但该泵的旋转活塞平衡长期以来无精确计算方法。
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