We read that the traveler asked the boy if the swamp before him had a hard bottom.

Therefore, the use of deep plowing technology to break the hard bottom is the effective method to improve the quality of tobacco growing.

因此，运用深耕深松技术来打破犁底层，是提高烟草种植质量行之有效的方法。

Hard bottom shoe sole contact area for arches, have protective effect.

硬底鞋足底接触面积最小，对足弓有保护作用。

Classification of lake bottom sediments using a wideband active sonar system Application of self-organizing mapping artificial neural networks to grain-size analysis

宽带声呐湖底沉积物分类研究自组织人工神经网络在矿区沉积物分类中的应用

The anchor caught in the mud of the lake bottom and kept the boat from moving.

锚钩住湖底的泥巴，使船不致移动。

Envelop Feature Extraction of Lake Bottom Echoes

湖底回波的包络特征提取

Lake bottom scattering strength is obtained by processing lake bottom scattering data with such formula.

依据该表达式对湖上实验采集的湖底散射数据进行了处理，得到了湖底散射强度。

Experimental Studies on Porcelain Brick Preparation Using Lake Bottom Sediments and Coal Fly Ash

利用湖泊底泥和粉煤灰制备瓷质砖的实验研究

Investigation on the migration and distribution patterns of petroleum-series contaminants in lake bottom silt

石油污染物在湖底淤泥中迁移和分布规律的研究

The paper presents a method of lake bottom sediment classification using echo signals provided by a wideband active sonar.

本文论述如何运用实际宽带主动声呐的回波信号识别湖底沉积物介质类型。

Summary and Analysis of Yellow River Bottom Tearing Scouring

目前黄河揭底冲刷研究情况的分析

Flume Test on River Bottom Protection Works

河床护底工程水槽试验

Investigation on The Thermodynamic of cadmium Adsorption on River Bottom sediment

河流底质泥沙吸附镉的热力学研究

STRATUM Ground Consolidation and Cavern Construction Technology for River Bottom Tunnel

江底盾构隧道地层加固及洞室施工技术

Frozen Construction Technology for Communication Channel of River Bottom Underway

江底地铁隧道联络通道冻结施工技术

Design and Application of Stress type River Bottom Contactor

应力式河底接触器的设计与应用

State Matrix Analysis for Free Spanning Length of River Bottom Pipeline

河底管道悬空段状态矩阵分析

Then four improved measures and some experiments have been done, which includes four parts: Firstly, the experiment of distributing pill on bottling machine.

本文介绍中药装瓶、包装生产线的总体概况，然后结合装瓶机的样机提出了四点重大改进并且做出相应的实验：1、装瓶机布丸系统的模型实验；

The application result shows that the technology raises the bottling machine's low temperature adaption and improves equipment performance.

应用结果表明，该技术提高了灌装机的低温适应性，改善了设备性能。

Innovative design of paint bottling machine

颜料灌装机的创新设计

The control of tablet bottling machine by computer

药粒分装机的计算机控制