tly

Derrick as one special apparatus of petroleum drilling production , price is c (?) tly and safe performance requirement is strict .

井架作为石油钻井生产的一种特种设备，价格昂贵、安全性要求高。

To observe const an tly for 2 months .

均连续观察2个月。

The efficacious capacity of water absorption of eroded soil are 15 % and less than 10 % for the sligh - tly and seriously eroded soils respectively .

轻度和严重侵蚀类型土壤的吸持有效水容量分别为15%和不足105。

The maximum effective hole diameter mathematical model describing flow of sligh + tly compressible fluid through a three layer crossflow reservoir is solved rigorously with consideration of wellbore storage and different skin factors .

在考虑表皮效应和井筒储存的影响的条件下，采用最大有效井径的概念，建立无限大三层越流油藏井底压力的动态模型。

Conclusions PNA can be delivered into tumor cells in form of PNA-DNA hybrids by cationic liposome . Properly designed antisense PNA can inhibit MDR related P-gp expression of SK-N-SH cells efficien - tly and specifically .

结论PNA-DNA杂交阳离子脂质体转染法可有效增加细胞对PNA的摄取，特异序列的反义PNA可在一定程度上阻断神经母细胞瘤MDR相关蛋白P-gp的表达。