一、前言目前,日本工业由经济高速度发展向减缓速度而稳定成长方向转变,由数量上的发展转到增加品种,提高质量方面来。土木建筑业在新潮流中,努力发展更完善的施工技术和引进施工设备,实现工程施工的高速化、省力化。混凝土泵制造厂为了满足建筑业的迫切需要,研制了新产品“BA型丸矢PM混凝土泵”。在日本首先由丸矢工业公司引进西德普兹麦斯特公司开创的技术而制成本机。从西德普兹麦斯特公司引进的是象鼻管部分(相当于以前的混凝土泵的闸阀部分)。其它 I. Preface At present, Japan’s industry has shifted from a high-speed economic development to a stable and growing pace of slowing down. From the quantitative development to the increase in variety and quality. In the new trend, the civil construction industry is striving to develop more perfect construction technology and the introduction of construction equipment to achieve high-speed and labor-saving construction. In order to meet the urgent needs of the construction industry, the concrete pump manufacturer has developed a new product “BA type Maruma PM concrete pump.” This machine was first made in Japan by Maruzen Industrial Co., Ltd. by introducing the technology pioneered by the West German company. The proboscis part (equivalent to the gate valve part of the previous concrete pump) was introduced from Sidzpur Mestre. other