A trademark used for a machine that sets type on a metal slug, operated by a keyboard.
行型活字排版机一种商标，用于指利用键盘操作排成铅字条的排字机。
Ludlow: Proprietary name of a display-size typesetting machine for which the matrices are assembled by hand and the type is cast in line slug.
勒德罗排铸机：标题字排铸机的专利名称。它用手工执排字模，然后铸成单个铅字。
I learned years later that it was in fact a type of Nudibranch, or sea slug.
几年后，我才知道，事实上，它是一种裸鳃类动物，或者说它是一种海蛞蝓。
However, it was still lack of systematic study of rheology of gel ZND. And the rationality, correctness and feasibility of the separating-type gel slug principle need to be verified yet.
②凝胶ZND是否能够形成隔断地层流体与井筒流体联系的隔断式凝胶段塞，所形成的凝胶段塞是否具有启动压力梯度及其调控措施仍需实验和现场试验证实；
However, it was still lack of systematic study of rheology of gel ZND. And the rationality, correctness and feasibility of the separating-type gel slug principle need to be verified yet.
②凝胶ZND是否能够形成隔断地层流体与井筒流体联系的隔断式凝胶段塞，所形成的凝胶段塞是否具有启动压力梯度及其调控措施仍需实验和现场试验证实；
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