核工业北京化工冶金研究院于１９５９年就研制出按体积取样的Ｗ１型自动部分收集器（“小车取样器”）；１９７２年又研制出Ｗ２型“时钟取样器”；１９８７年再创Ｗ３型；总结各阶段研制经验并参考国内同类产品的优点，于１９９８年初又成功研制全新一代智能型Ｗ４自动部分收 Beijing Institute of Chemical Industry and Metallurgy of Nuclear Industry developed the W1 type automatic partial collector (“car sampler”) according to the volume sampling in 1959; developed the W2 “clock sampler” in 1972; ; Summed up the experience of various stages of development and reference to the advantages of similar products in China at the beginning of 1998 and successfully developed a new generation of intelligent W4 automatic part of the income