1.
Comparison of Maize Densities with Cultivation Technique of Partial Ridge Permeability
玉米偏垄通透栽培密度对比试验研究
2.
Test method for density and relative density of plastics
GB/T1033-1986塑料密度和相对密度试验方法
3.
testing method of the density and specific gravity for plastics
塑料的密度及比重试验方法
4.
Test methods for density and relative density of fiber reinforced plastics
GB/T1463-1988纤维增强塑料密度和相对密度试验方法
5.
Test method for specific optical density of smoke generated by solid materials
GB/T10671-1989固体材料产烟的比光密度试验方法
6.
Research on the Heat Interchanger's Different Material Comparison of Bulk Curing Barn;
密集烤房换热器不同材质对比试验研究
7.
Comparative experiment of high vacuum densification method and routine dynamic consolidation method in dredger fill soil
吹填土高真空击密法与常规强夯法对比试验
8.
water pressure test for strength and tightness
水压强度和密封性试验
9.
air pressure test for strength and tightness
气压强度及气密试验
10.
mullen Bursting strength tester
密廉式破裂强度试验机
11.
oil pressure test for strength and tightness
强度和密封性油压试验油压及强度密封试验
12.
Analysis on International Contrast Test of Brinell Hardness
布氏硬度国际比对试验中的几个问题
13.
COMPARATIVE EXPERIMENTAL ANALYSIS OF CONCRETE STRENGTH INSPECTION TECHNOLOGY
混凝土强度检测技术的对比试验分析
14.
Study on comparative experiment of the lake water advanced treatment
湖泊水深度处理工艺的对比试验研究
15.
Skewed Slot Wheeled Seeding Mechanism Working Length Comparative Trial Research
斜槽轮式排种器工作长度的对比试验
16.
Some improvements on particle analysis experiment based on densimeter settlement method
对密度计沉降法颗粒分析试验的一点改进
17.
general methods of test for pigments and extenders:determination of density-pyknometer method
颜料和扩展剂颜料普通试验方法：密度的测定-比重瓶法
18.
At the same time, the screening cultivars and densities, and testing the effect of different N, P, K ratios were conducted.
同时进行了品种和密度筛选和不同氮、磷、钾配比效果试验。