On the market of bilateral monopoly structure, however, the prices of weapons, which are often more higher than ordinary level due to asymmetric information, are decided by negotiations or bargaining.
Economic building blocks are meanwhile characterized by a multi-layered structure involving a myriad of efforts by different partnership arrangements: bilateral, trilateral or sub-regional.
经济大厦的搭建是具有多层结构的，涉及各式各样的不同的伙伴关系：双边的，三边的或次区域性的。
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It also provides a bilateral metal hardware sealed butterfly valve, and the structure of butterfly valve, working principle, reliability and features of seal are discussed.